What turbo for road racing? - SRT Forums

turbozetec · 11-13-2012, 10:26 AM

What turbo are you guys running? I'm planning on getting my car set up for some Road Races nothing professional just for fun. I have an agp 50trim that makes 20psi around 3900-4k. There is a lot of lag to the turbo and I'm thinking I need something that will spool quicker to pull me out of the turns. The boost comes on hard at 3500 its makes 10psi then slams to 20 by 3900 and usually spins and torque steers, It pulls hard from that point to redline but when I shift it takes a second or 2 to build boost again. What are your subjection?

Thanks

Ridin59vette · 11-13-2012, 10:37 AM

Sounds like a boost leak, You should be seeing alot more boost by 3500 RPM

triangles · 11-13-2012, 10:39 AM

My stage 3 is just like stock boost but instead of 15 psi its 21. And ii like the power haven't tested around corners yet. Only been straight shots. Or you could look in to something like a persision I know they make a 50 trim like that spools up faster

**underSRTarmor** · 11-13-2012, 10:43 AM

^^ 5431.

Autoguide.com App

triangles · 11-13-2012, 10:51 AM

Quote: Originally Posted by underSRTarmor

^^ 5431.

Autoguide.com App

Yea that one I've heard good stuff about that one seen good and track times

turbozetec · 11-13-2012, 11:12 AM

I was thinking about the 5431 and I have been reading through the Precision turbo owners thread. I would like to keep the power levels around 380-400wph on 93 and I don't know if it will support that with pump gas. I was also thinking about the GTX3071r as well.

I don't believe that there is a boost leek as the spool of the turbo has been the same since I installed it. According to AGP this 50trim will max out around 480whp so that's where the slower spool comes from.

Rhunter · 11-13-2012, 11:13 AM

I think the turbo you have is fine. I would check for boost leaks and I would also look into better boost management. Perhaps something that provides boost my gear like a N2MB boost box?

**underSRTarmor** · 11-13-2012, 11:14 AM

Quote: Originally Posted by turbozetec

I was thinking about the 5431 and I have been reading through the Precision turbo owners thread. I would like to keep the power levels around 380-400wph on 93 and I don't know if it will support that with pump gas. I was also thinking about the GTX3071r as well.

I don't believe that there is a boost leek as the spool of the turbo has been the same since I installed it. According to AGP this 50trim will max out around 480whp so that's where the slower spool comes from.

to achieve that power on 93 only you wont have a great spool...

turbozetec · 11-13-2012, 11:21 AM

Quote: Originally Posted by Rhunter

I think the turbo you have is fine. I would check for boost leaks and I would also look into better boost management. Perhaps something that provides boost my gear like a N2MB boost box?

I just don't want to wait for the spool in a road race. On a drag strip it wouldn't be a problem wind it out and shift but if I'm down low in the rpms I would like some bottom power to pull me out of turns with out downshifting to 2nd spinning.

Rhunter · 11-13-2012, 11:37 AM

Quote: Originally Posted by turbozetec

I just don't want to wait for the spool in a road race. On a drag strip it wouldn't be a problem wind it out and shift but if I'm down low in the rpms I would like some bottom power to pull me out of turns with out downshifting to 2nd spinning.

You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller?

Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going?

Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents.

dustin.b · 11-13-2012, 12:11 PM

Quote: Originally Posted by Rhunter

You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller?

Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going?

Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents.

Ralph and under are the men....I've learned alot of stuff from these guys the short time I've been on the forums.....id do what they're saying....road racing isn't about how hp you make...its about how efficiently you transfer what power you have to the road.

turbozetec · 11-13-2012, 01:05 PM

Quote: Originally Posted by Rhunter

You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller?

Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going?

Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents.

I agree with you I am using a mbc boost by gear is the way to go on any setup and a boost box is something I have been planing on getting for some time now. I just think a turbo with faster spool will work better on a road course.

turbozetec · 11-13-2012, 01:24 PM

If I had to guess with my setup I'm making in the high 300's and with a turbo that makes 20psi at almost 4k and is good for almost 500whp I would like to have a turbo with fast spool and make around 400whp. This turbo pulls like crazy after 4k I would like to move the power band down 500rpms

**underSRTarmor** · 11-13-2012, 01:42 PM

Quote: Originally Posted by dustin.b

Ralph and under are the men....I've learned alot of stuff from these guys the short time I've been on the forums.....id do what they're saying....road racing isn't about how hp you make...its about how efficiently you transfer what power you have to the road.

Thanks man! Ralph has opened my eyes to alot. I just catch in fast.

I'm not always right tho.

But thank you. = )

Autoguide.com App

**1LAPSRT** · 11-13-2012, 02:04 PM

What manifold and a/r housing do you have? If you run a crappy log manifold and anything larger than a .63 and you are hurting your spool...

11-13-2012, 10:26 AM	#1 (permalink)
turbozetec SRTforums Member Join Date: Apr 2007 Member Number: 53513 Location: Front Royal, VA Posts: 181	What turbo for road racing? What turbo are you guys running? I'm planning on getting my car set up for some Road Races nothing professional just for fun. I have an agp 50trim that makes 20psi around 3900-4k. There is a lot of lag to the turbo and I'm thinking I need something that will spool quicker to pull me out of the turns. The boost comes on hard at 3500 its makes 10psi then slams to 20 by 3900 and usually spins and torque steers, It pulls hard from that point to redline but when I shift it takes a second or 2 to build boost again. What are your subjection? Thanks __________________ Red 04 NSRT-4 -- AGP 50 trim kit, 900cc injectors, AGP return line, Walbro 255, bottle neck fix, AEM Meth kit.

11-13-2012, 10:37 AM	#2 (permalink)
Ridin59vette SRTforums Member Join Date: Sep 2011 Member Number: 86347 Location: Albany Posts: 1,149	Sounds like a boost leak, You should be seeing alot more boost by 3500 RPM __________________ 04 SRT-4: Under Construction 99 9-3: Daily Driver FS Thread: http://www.srtforums.com/forums/f416...5/#post9777568

11-13-2012, 10:39 AM	#3 (permalink)
triangles SRTforums Member Join Date: Aug 2010 Member Number: 80981 Location: riverbank ca Posts: 595	My stage 3 is just like stock boost but instead of 15 psi its 21. And ii like the power haven't tested around corners yet. Only been straight shots. Or you could look in to something like a persision I know they make a 50 trim like that spools up faster __________________ 05 flame red bw Stage 3 47lb 20g By Mole' *daily driven* E85

11-13-2012, 10:43 AM	#4 (permalink)
underSRTarmor Premium Member (Lifetime) SRT of the Month Join Date: Aug 2005 Member Number: 32888 Location: N. La/ E. Tx Posts: 7,911	^^ 5431. Autoguide.com App __________________ • MyBuild Thread • Duster360 Track Times List • PTE 5831 info • MAP Sensor info TUNED by DUSTER360 PTE 5831 11.19 @125.65 1.64 60ft 27 psi ^^^all clickable

11-13-2012, 10:51 AM	#5 (permalink)
triangles SRTforums Member Join Date: Aug 2010 Member Number: 80981 Location: riverbank ca Posts: 595	Quote: Originally Posted by underSRTarmor ^^ 5431. Autoguide.com App Yea that one I've heard good stuff about that one seen good and track times __________________ 05 flame red bw Stage 3 47lb 20g By Mole' *daily driven* E85

11-13-2012, 11:12 AM	#6 (permalink)
turbozetec SRTforums Member Join Date: Apr 2007 Member Number: 53513 Location: Front Royal, VA Posts: 181	I was thinking about the 5431 and I have been reading through the Precision turbo owners thread. I would like to keep the power levels around 380-400wph on 93 and I don't know if it will support that with pump gas. I was also thinking about the GTX3071r as well. I don't believe that there is a boost leek as the spool of the turbo has been the same since I installed it. According to AGP this 50trim will max out around 480whp so that's where the slower spool comes from. __________________ Red 04 NSRT-4 -- AGP 50 trim kit, 900cc injectors, AGP return line, Walbro 255, bottle neck fix, AEM Meth kit.

11-13-2012, 11:13 AM	#7 (permalink)
Rhunter SRTforums Member Join Date: Dec 2005 Member Number: 36794 Location: LOCASH Posts: 10,527	I think the turbo you have is fine. I would check for boost leaks and I would also look into better boost management. Perhaps something that provides boost my gear like a N2MB boost box? __________________ Nunca Levanta A Lotta turbo! Small motor! And a Go Pedal!! Lets re-grow the community! Subscribe to: www.elralforacingmedia.wordpress.com

11-13-2012, 11:14 AM	#8 (permalink)
underSRTarmor Premium Member (Lifetime) SRT of the Month Join Date: Aug 2005 Member Number: 32888 Location: N. La/ E. Tx Posts: 7,911	Quote: Originally Posted by turbozetec I was thinking about the 5431 and I have been reading through the Precision turbo owners thread. I would like to keep the power levels around 380-400wph on 93 and I don't know if it will support that with pump gas. I was also thinking about the GTX3071r as well. I don't believe that there is a boost leek as the spool of the turbo has been the same since I installed it. According to AGP this 50trim will max out around 480whp so that's where the slower spool comes from. to achieve that power on 93 only you wont have a great spool... __________________ • MyBuild Thread • Duster360 Track Times List • PTE 5831 info • MAP Sensor info TUNED by DUSTER360 PTE 5831 11.19 @125.65 1.64 60ft 27 psi ^^^all clickable

11-13-2012, 11:21 AM	#9 (permalink)
turbozetec SRTforums Member Join Date: Apr 2007 Member Number: 53513 Location: Front Royal, VA Posts: 181	Quote: Originally Posted by Rhunter I think the turbo you have is fine. I would check for boost leaks and I would also look into better boost management. Perhaps something that provides boost my gear like a N2MB boost box? I just don't want to wait for the spool in a road race. On a drag strip it wouldn't be a problem wind it out and shift but if I'm down low in the rpms I would like some bottom power to pull me out of turns with out downshifting to 2nd spinning. __________________ Red 04 NSRT-4 -- AGP 50 trim kit, 900cc injectors, AGP return line, Walbro 255, bottle neck fix, AEM Meth kit.

11-13-2012, 11:37 AM	#10 (permalink)
Rhunter SRTforums Member Join Date: Dec 2005 Member Number: 36794 Location: LOCASH Posts: 10,527	Quote: Originally Posted by turbozetec I just don't want to wait for the spool in a road race. On a drag strip it wouldn't be a problem wind it out and shift but if I'm down low in the rpms I would like some bottom power to pull me out of turns with out downshifting to 2nd spinning. You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller? Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going? Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents. __________________ Nunca Levanta A Lotta turbo! Small motor! And a Go Pedal!! Lets re-grow the community! Subscribe to: www.elralforacingmedia.wordpress.com

11-13-2012, 12:11 PM	#11 (permalink)
dustin.b SRTforums Member Join Date: Feb 2012 Member Number: 88244 Location: Indiana Posts: 177	Quote: Originally Posted by Rhunter You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller? Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going? Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents. Ralph and under are the men....I've learned alot of stuff from these guys the short time I've been on the forums.....id do what they're saying....road racing isn't about how hp you make...its about how efficiently you transfer what power you have to the road.

11-13-2012, 01:05 PM	#12 (permalink)
turbozetec SRTforums Member Join Date: Apr 2007 Member Number: 53513 Location: Front Royal, VA Posts: 181	Quote: Originally Posted by Rhunter You can address this via better boost management. You mentioned in your 1st post that you have you boost set at 20 PSI? This leads me to believe you are using some sort of manual boost controller? Wouldn't it be great to set your target boost for the gear you are in? You will make 10 or 12 PSI faster than you will make 20 PSI? See where I'm going? Regardless of what turbo you end up getting, I think you will benefit from better boost control. Just my .02 cents. I agree with you I am using a mbc boost by gear is the way to go on any setup and a boost box is something I have been planing on getting for some time now. I just think a turbo with faster spool will work better on a road course. __________________ Red 04 NSRT-4 -- AGP 50 trim kit, 900cc injectors, AGP return line, Walbro 255, bottle neck fix, AEM Meth kit.

11-13-2012, 01:24 PM	#13 (permalink)
turbozetec SRTforums Member Join Date: Apr 2007 Member Number: 53513 Location: Front Royal, VA Posts: 181	If I had to guess with my setup I'm making in the high 300's and with a turbo that makes 20psi at almost 4k and is good for almost 500whp I would like to have a turbo with fast spool and make around 400whp. This turbo pulls like crazy after 4k I would like to move the power band down 500rpms __________________ Red 04 NSRT-4 -- AGP 50 trim kit, 900cc injectors, AGP return line, Walbro 255, bottle neck fix, AEM Meth kit.

11-13-2012, 01:42 PM	#14 (permalink)
underSRTarmor Premium Member (Lifetime) SRT of the Month Join Date: Aug 2005 Member Number: 32888 Location: N. La/ E. Tx Posts: 7,911	Quote: Originally Posted by dustin.b Ralph and under are the men....I've learned alot of stuff from these guys the short time I've been on the forums.....id do what they're saying....road racing isn't about how hp you make...its about how efficiently you transfer what power you have to the road. Thanks man! Ralph has opened my eyes to alot. I just catch in fast. I'm not always right tho. But thank you. = ) Autoguide.com App __________________ • MyBuild Thread • Duster360 Track Times List • PTE 5831 info • MAP Sensor info TUNED by DUSTER360 PTE 5831 11.19 @125.65 1.64 60ft 27 psi ^^^all clickable

11-13-2012, 02:04 PM	#15 (permalink)
1LAPSRT Premium Member (Lifetime) SRT of the Month 2011 Calendar Car Join Date: Feb 2006 Member Number: 38267 Location: Upstate SC Posts: 8,690	What manifold and a/r housing do you have? If you run a crappy log manifold and anything larger than a .63 and you are hurting your spool... __________________ *** Modern Performance SRT4 - Dominating the road race community for over 5 years! 2012 MPx SRT4 Racing and Event schedule: http://www.srtforums.com/forums/f77/...2012-a-627265/ Get your fix of SRT-4 racing here : www.WindspeedMotorsports.com

Remove Advertisements Sponsored Links
SRT Forums - SRT4, SRT6, SRT8, SRT10 & Dodge Forum Advertisement

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode