PT/SRT/GT rockers vs 2.7v6 rockers

1208 Views 8 Replies 5 Participants Last post by RedSRT4Me, Jun 17, 2003

RedSRT4Me

Discussion Starter · Apr 20, 2003

anyone make the comparison between each rocker. Just planning ahead for some future mods. On older gen DOHC 2.4/2.0 motors the 2.7's from the v6 are better quality than the PT's. Anyone know if the SRT/GT was updated, or still PT style?

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emericanchaos

· #2 · Apr 27, 2003

i dont' think they were. http://www.howellautomotive.com sells PT 2.4 lash adjusters and rockers as an upgrade. so going from that i would assume that the PT valvetrain is more efficient.

i'm coming from the lang of non turbo 2g eclipses. and those are sold as an upgrade for that motor as well (420a)

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Scott Mohler

· #3 · May 14, 2003

The SRT-4 Rocker is the lightest and strongest rocker to hit this head yet. The Valves in the SRT-4 are also very strong and durable. (Cox runs stock exhaust SRT-4 valves!!)

I just wonder what kind of lift these valve springs can hold? If the stock springs can hold a slightly higher lift of a Crane grind, then it wouldnt cost that much at all to get this thing some more top end. Only prob is the 6 grand rev limiter.

Scott

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el_jefe

· #4 · May 14, 2003

Scott Mohler said:
The SRT-4 Rocker is the lightest and strongest rocker to hit this head yet. The Valves in the SRT-4 are also very strong and durable. (Cox runs stock exhaust SRT-4 valves!!)

I just wonder what kind of lift these valve springs can hold? If the stock springs can hold a slightly higher lift of a Crane grind, then it wouldnt cost that much at all to get this thing some more top end. Only prob is the 6 grand rev limiter.

Scott

Yeah, I got into a pissing match with a guy on Neons.org about the rev limit. I am hoping the Stage 1 will bump it up 500 - 750 or so. As Cox seems to be getting 9000 - 10,000 rpm with a lot of stock parts, I think it can handle it. What I want to know at what point the Crane #18's cause backpressure (as mentioned in the HCI article) Is this going to be a problem for street drivers?

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RedSRT4Me

Discussion Starter · #5 · May 14, 2003

I just wonder what kind of lift these valve springs can hold? If the stock springs can hold a slightly higher lift of a Crane grind, then it wouldnt cost that much at all to get this thing some more top end. Only prob is the 6 grand rev limiter.

Yeah, I got into a pissing match with a guy on Neons.org about the rev limit. I am hoping the Stage 1 will bump it up 500 - 750 or so. As Cox seems to be getting 9000 - 10,000 rpm with a lot of stock parts, I think it can handle it. What I want to know at what point the Crane #18's cause backpressure (as mentioned in the HCI article) Is this going to be a problem for street drivers?

My plan was to take the head off and have it ported and polished along with some crane springs and crane 14 cams. Reason I was thinking 14's instead of say 16's or 18's was because as scott mentioned the rev limit. No point in installing 18's when they make peak power at 7grand+.

Also (hoping) when the bigger turbo's come out (the 14's) will help with spool and get the same kinda low end this little TDOH4 puts out.

I know everyone likes to use the big boyz as an example when refering to parts but I don't. Reason being is they are going for all out power and have the financial backing to fix any problems that go wrong. I don't

Plus I want my car as streetable as possible. I don't want to lose the creature comfort's like I did the 1st gen. 8)

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el_jefe

· #6 · May 14, 2003

RedSRT4Me said:
My plan was to take the head off and have it ported and polished along with some crane springs and crane 14 cams. Reason I was thinking 14's instead of say 16's or 18's was because as scott mentioned the rev limit. No point in installing 18's when they make peak power at 7grand+.

Also (hoping) when the bigger turbo's come out (the 14's) will help with spool and get the same kinda low end this little TDOH4 puts out.

I know everyone likes to use the big boyz as an example when refering to parts but I don't. Reason being is they are going for all out power and have the financial backing to fix any problems that go wrong. I don't Plus I want my car as streetable as possible. I don't want to lose the creature comfort's like I did the 1st gen. 8)

Yeah, but I love a loping idle :twisted:

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RedSRT4Me

Discussion Starter · #7 · May 14, 2003

hehe been there and done that with a set of 18's all motor in the 2.4 in my 1st gen. Snapped the water pump tensioner bolt and tossed the timing belt causing valves to touch. Rebuilt it again with pistons and rods this time along with crane 22's. This time after 600 mils the tensioner bolt in the head snapped. Gave that up sold the all motor stuff and now stuck with 2 neons with 2.4's and turbo's :evil:

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BigWoody

· #8 · Jun 10, 2003

Why Rev the 2.4 that high guys?? I was told that there is no sense in reving that thing over 6500 RPM's??

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RedSRT4Me

Discussion Starter · #9 · Jun 17, 2003

depends on the cams woody.

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