LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

400+rwhp with heads/cam and under 6k rpms??

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Old Oct 23, 2002 | 08:42 PM
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400+rwhp with heads/cam and under 6k rpms??

Aynone running a setup like this? Most guys I see running 400+rwhp are revving past 6k. Anyone makin 400+rwhp with heads/cam spinning to stock rev limiter or a tad over?
Old Oct 23, 2002 | 09:21 PM
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We made over 400rwhp by 5450rpm last time... so yes.. it's more than doable... just depends on what you put into it & how you wanna use it .

Last edited by Ai; Oct 23, 2002 at 09:23 PM.
Old Oct 23, 2002 | 10:19 PM
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Originally posted by SkarodoM
We made over 400rwhp by 5450rpm last time... so yes.. it's more than doable... just depends on what you put into it & how you wanna use it .
What are the mods?
Old Oct 23, 2002 | 10:36 PM
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Heads, cc306ish hydraulic, headers, single cutout, 58mm TB... stock shortblock...

Mudge did the same with shorties & a 122k mile shortblock.. his opti was borked, but it did 400rw by 5600rpm im sure.

The right cam and heads can do it easily. Hard part is finding the right stuff =P
Old Oct 24, 2002 | 01:42 AM
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http://docmudge.tripod.com/dynorun030902/index.html

Heads, cam, SLP shorties (not long tubes), cutout, electric water pump (CSI), double roller (Cloyes), 1.6 non SA, R lifters, K&N CAI

Last edited by Dr.Mudge; Oct 24, 2002 at 01:48 AM.
Old Oct 24, 2002 | 01:56 AM
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I'm **** about info.. and give others a hard time about posting their dyno numbers when they are using the "STD" correction factor to get boosted numbers instead of SAE... So tho Mudge forgot, I should mention that those are obviously Actual HP numbers, and SAE that particular run was 413 i believe.. will knows for sure.. but i think it was 413.. there was a huge thread on it
Old Oct 24, 2002 | 07:58 AM
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It has been done on this board, I am TRYING to do it, why does it have to be under 6000 RPM? I shift my car at 6500 RPM by the factory tach, have shifted it at 6900 RPM, granted I have a balanced bottom end. My cam is 224/228@.550..570/580 on a 112 LSA, Its a Crower custom grind. If you want to do it under 6000 RPM you will need a 110 LSA cam ( gonna get some flack for that) and it will have less street manners, if you have a M6 it will be easier.I have researched the cam LSA voodoo ALOT, I wish I would have put a 110 LSA in as Crower recommended, he said I lost upwards of 20 rwhp by dropping duration and opening up to a 112 LSA. I wanted a docile street car,daily driver....so... I will put the 110 LSA in later. There are two REAL good cam articles I gained alot from, Chevy High Performance May 2002 isuue and Hot Rod Sept 2002 issue. Enlightened me to what I thought I knew, its kinda weird though the cams that run in these cars are DOGS in5.0 mustangs(spec wise) and thats what I am used to building. But you need heads that flow at least 260/190@.550, 11to1 comp, 52MM TB,1 3/4 headers,30 lb inj, ported intake, the right computer burn. and most of all the right cam, good luck!!

I think I am around 370 ish RWHP judging from my 3775 weight and 89.1 MPH in the 1/8 mile, conditions in sig. With all the rest on stuff I should get close to 400 RWHP

David

Last edited by FASTFATBOY; Oct 24, 2002 at 08:09 AM.
Old Oct 24, 2002 | 09:35 AM
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David, I always thought the cams f-body people used to run were mild too, but they are spec'd with 1.5 rockers, and most people use 1.6s. Fords are done at 1.6, so they are listed at what it will be for most people. I know some people run 1.7s, but most stick with the 1.6. I think the rest of the difference comes from the added cubic inches and better head flow, a lot of people feel they don't NEED to run as big of a cam, to get the power they want. Less compromises basically.
Old Oct 24, 2002 | 09:41 AM
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Originally posted by FASTFATBOY
It has been done on this board, I am TRYING to do it, why does it have to be under 6000 RPM?
David
Possibly for A4 reasons?
Old Oct 24, 2002 | 09:53 AM
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The hardest part is decided where to plunk down the $1500-2000 to get heads that will actually do what they are telling you.
Old Oct 24, 2002 | 10:08 AM
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Originally posted by dabear95
The hardest part is decided where to plunk down the $1500-2000 to get heads that will actually do what they are telling you.
I have $950 in my heads ready to bolt on the car, $2000...where did that come from??

David
Old Oct 24, 2002 | 12:26 PM
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That is just what I have been seeing for a set of heads to produce around 400RWHP on an A4. I'm not talking about just the port work. And I know you can bang out a few cfm for 20 bucks in the back yard...

For me, I have no experience with porting heads, nor do I know anyone in the industry. So it becomes difficult to trust people when you hear so many bad stories. I want to do the work myself (installation), but I do not believe that I am capable of porting the heads myself to achieve the results I am looking for.

Thanks,
Jason
Old Oct 24, 2002 | 06:04 PM
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why does it have to be under 6000 RPM? I shift my car at 6500 RPM by the factory tach, have shifted it at 6900 RPM
No big reason. I just didnt want to spin the stock crank too much higher than stock, although i have seen guys spinning close to 7k like you said on a stock block with no problems. 6500rpm or a tad under I would except. Just nothin closer to 7k. What cam (part number or somethin) would do this for me? Oh yea i have a 6speed btw.

Skardom- Could you guys set me up with what im lookin for? Cam and heads to get 400rwhp and under 6500rpm (preferably lower than 6500 but that would work)? $$ estimate?
Old Oct 24, 2002 | 06:32 PM
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sure

hope you dont mind, i sent you an email b/c im not sure what exactly to tell you w/o knowing some things first
Old Dec 17, 2003 | 07:15 PM
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my peak 420+HP is at 5300RPM



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