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Old 11-26-2008, 11:53 AM   #1 (permalink)
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Default May I spray 75 shot with Map Clamp?

May I spray 75 shot with Map Clamp? Due “How to 300 whp stock turbo…” says the map clamp is for timing advance purposes, it is safe use the nitro shot with the map clamp same time?
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Old 11-26-2008, 08:55 PM   #2 (permalink)
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Quote: Originally Posted by locadio View Post
May I spray 75 shot with Map Clamp? Due “How to 300 whp stock turbo…” says the map clamp is for timing advance purposes, it is safe use the nitro shot with the map clamp same time?

Guys have sprayed a 75 on top of a map clamp. I personally would not do it with my car unless I had a way to measure KR.

A map clamp is not for timing advance purposes "pursay". What is does is hide boost from the PCM. The PCM in turn leans out your fuel. As far as timing goes, because the PCM see's less boost it runs more timing. So it's not advancing timing, it's tricking the PCM into running more timing.

Nitrous + advanced timing can cause trouble.
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Old 11-26-2008, 10:27 PM   #3 (permalink)
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Quote: Originally Posted by locadio View Post
May I spray 75 shot with Map Clamp? Due “How to 300 whp stock turbo…” says the map clamp is for timing advance purposes, it is safe use the nitro shot with the map clamp same time?

wow if you want to mix the 300 hp stock map-clamp recipe with a 75 shot you are brave

the 300 recipe has been proven so i guess i cant beat it up too much (it beats the hell out of a lot of big turbo attempts)

a 75 shot is also proven well


but mixing the two is kinda scary, if your gonna do it do your home work and log timing manifold pressures (remember clamped wont read correct @ the map) so you can have a theoretical map of what the timing is at X rpm vs.Y psi then you will have a reference to start tuning

i would say with some RACE fuel and a 30 shot you will be good
but using a map clamp or a safc would need a retard box for the 75 shot you want to run (just for safety)


if your car reads knock while on the juice it too late
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Old 11-27-2008, 09:03 AM   #4 (permalink)
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Thanks a lot guys
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Old 11-27-2008, 11:43 AM   #5 (permalink)
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come on you can do it just need a scan gauge and race gas. i could only run a 35shot with meth with out a ton of knock but i have ran a 150 shot with q16 race gas clamped with a safc at 24psi. but bare min. is race gas and a scan gauge to look at kr before you spray anything. many people think if you are going to spray you cant clamp. i only got about 2deg more timing from clamped to unclamped. and i would pull alot of fuel out on the topend. if you are looking at running more than 18psi of boost and spraying then you need a clamp or you will pull timing from maxing out the map sensor.
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Old 11-27-2008, 11:58 AM   #6 (permalink)
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if you want to make reliable power without having issues the best way i would suggest doing it would be to remove the map clamp and tune it with the fuel jet
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Old 11-27-2008, 07:28 PM   #7 (permalink)
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so what would the recipe 50 trim+stage 1+75 shot =

does the stage 1 advance timing as much as a map clamp??
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Old 11-27-2008, 09:10 PM   #8 (permalink)
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Quote: Originally Posted by 04srt-4's!nEvErHiDe! View Post
so what would the recipe 50 trim+stage 1+75 shot =

does the stage 1 advance timing as much as a map clamp??

a map clamp tells the computer its seeing less boost than ther actually is so naturally it will give more timing so in short no
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Old 11-28-2008, 12:39 AM   #9 (permalink)
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well n2mb what do you do if your running over 18psi? its a joke. i have answered this question 100times you can run with a clamp if you know what your doing and have good monitoring tools. scan gauge, egt gauge for a big shot, and a wideband. its all in the tune. i have done alot of time logging timing, egt's, afr's on my car. and put alot of that info out on here for people to find. but it can be safe to run a clamp and spray plain and simple.
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Old 11-28-2008, 05:49 AM   #10 (permalink)
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Quote: Originally Posted by D_MONEY View Post
well n2mb what do you do if your running over 18psi? its a joke. i have answered this question 100times you can run with a clamp if you know what your doing and have good monitoring tools. scan gauge, egt gauge for a big shot, and a wideband. its all in the tune. i have done alot of time logging timing, egt's, afr's on my car. and put alot of that info out on here for people to find. but it can be safe to run a clamp and spray plain and simple.

i never said you couldnt, i ran 17 psi, 100 shot on stock turbo,clutch and fuel system..tuned it off the fuel jet make 414/464 and run 11.7's . what more could i possibly ask out of the car that is so near to stock
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Old 11-28-2008, 09:13 AM   #11 (permalink)
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Quote: Originally Posted by D_MONEY View Post
well n2mb what do you do if your running over 18psi? its a joke. i have answered this question 100times you can run with a clamp if you know what your doing and have good monitoring tools. scan gauge, egt gauge for a big shot, and a wideband. its all in the tune. i have done alot of time logging timing, egt's, afr's on my car. and put alot of that info out on here for people to find. but it can be safe to run a clamp and spray plain and simple.

any car, camaro, vette, stang or SRT4 doesnt matter, more timing plus nitrous is generally a nono and risky. Its always better to run less boost, less timing add the juice and tune via the fuel jet. drag racers have been doing it that way for a long long time on drag cars.
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Old 11-28-2008, 11:40 AM   #12 (permalink)
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I agree with addicted and N2MB. When it comes to SRT's, simple is much much better. I won't mess with clamping, I figure the bases Intake, better exhaust flow and nitrous!!! Tune using the fuel pill and call it good.

I am considering a diablo but that will be for Off nitrous purposes.

Plenty of ways to skin this cat I guess.
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Old 11-28-2008, 11:51 AM   #13 (permalink)
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Moderate amounts of nitrous & timing is OK.

My boys stg2 car, no toys went 12.5 at 115+ with a fully loaded car with a 3500rpm launch off a 2step, 900psi with a NX 75shot.

There's not doubt that with 1100psi and a empty car it would've ran a 11 at a around 116-118mph.

He went to the track with a empty car, was going to go for a 4K launch off the 2 step with a full bottle at 1150psi, and it broke the axle the 1st time he launched.

stock turbo car on a 75-125shot is a stg3 killer. 114-120traps are possible.
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Old 11-28-2008, 01:00 PM   #14 (permalink)
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Quote: Originally Posted by DDogsrt461BLK 3.0 View Post

stock turbo car on a 75-125shot is a stg3 killer. 114-120traps are possible.

actually my car usually trapped around 124 with the stock turbo and gas.iirc my best trap on that setup was 124.7 or 125.1 i cant remember but i do remember i would gain anywhere from 30-34 mph in the back half. i could never get the car to hook in the 1/8th. even with consistent low 1.7's and a 1.64 60' i couldnt no matter what get the car to go over 95 in the 1/8th mile..it was usually around 91-92.

i could have went a lot faster too, i never wotshifted it on that setup...i didnt have any window switches or anything just a momentary contact i held in my hand while i was shifting so i sprayed it manually.maybe i should have made it easier for myself lol but i hardly had enough time to work on my own car so i pretty much i ran what i brang then jumped back into someone elses tune.
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Old 11-30-2008, 02:13 AM   #15 (permalink)
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Tuning with the fuel jet is really good advice! I have done both.. I have the car clamped spot on 18.. boost is set just about spot on 18. Why bother clamping then.. right? Well, on the sauce.. boost comes up almost another 2 pounds.

With that setup.. 37n 22f (jet sizes) The car ran a little bit on the lean side. High 11 low 12 AFR's.

With about 1/4 tank of 94.. and a bit of race gas, it went almost 119 mph. 118.73 to be exact. Went 92 mph in the 1/8th. I was pretty happy with it.

But, my plans for next year,.. well.. the same, or better trap speeds.. without the big blue bottle!

Maybe I'll put the sauce on my go-kart!! lol

Will.
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