Get me to 300 rwhp

Mike in Texas · Oct 12, 2007

I want to get 300 rwhp without nitrous or super/turbo charger. With the mods shown in my sig, what else do I need?

Thanks in advance for your help.

2Tone5.0 · Oct 12, 2007

Cobra intakes arent that great unless you get them ported which is a great deal of$$$. Get the gt40 intake to match the heads. i also had 24lb injectors with a 75mm throttle body which helped.

PUNISHER RACING · Oct 12, 2007

x or y gt40's also that e-cam is your biggest obstacle without a power adder it is a good camshaft but not for the number

JKidd · Oct 12, 2007

Port and polish the heads and intake. Shave a bit off the heads to increase compression ratio if you're going to stay N/A and it won't create piston/valve interference. Not sure what ratio rockers come with the motor but 1.72's roller rockers would help (if not already on there).

65mm TB should be big enough.

Underdrive pulleys to squeeze the last amount out of it and then a full 2.5" exhaust with high-flow H- or X-pipe to go with those headers.

And then, depending on budget, you could get a custom cam based on the ported/polished heads and your desires. However, I still really like the E cam.

And, lastly, you might have better results with a different MAF meter. Pro-M 75mm bullet or something like that..

SVT32VDOHC · Oct 12, 2007

What numbers are you at now?? Usually stock H/C/I packages get your to 300rwhp N/A.

PUNISHER RACING · Oct 12, 2007

Just replace the gt40's with a set of AFR 165's

Mike in Texas · Oct 12, 2007

Thanks

Thanks to you all for the advice. To SVT32, I haven't dynoed the car, so I'm not sure what I getting right now. I planned on waiting until I made any additional mods.

The exhaust chages suggested by Jkidd are all I can afford right now, will that help much if everything else stays the same?

ttop88 · Oct 12, 2007

Mike in Texas said:
Thanks to you all for the advice. To SVT32, I haven't dynoed the car, so I'm not sure what I getting right now. I planned on waiting until I made any additional mods.

The exhaust chages suggested by Jkidd are all I can afford right now, will that help much if everything else stays the same?

If you have a stock H and get a high flow it will be a noticable differance. If you still have stock mufflers anyaftermarket would make a huge differance. Headers are always good for hp and trq

samickguy15 · Oct 12, 2007

Upgraded motor without upgraded exhaust is kind of like eating a huge bowl of chilli and trying to pass gas through a single pore in your skin. AKA your stock exhaust is holding your motor back. I suspect in current configuration you should be at 300whp

tmoss · Oct 12, 2007

2Tone5.0 said:
Cobra intakes arent that great unless you get them ported which is a great deal of$$$.

not true.......on either count..........imho..........

samickguy15 · Oct 12, 2007

tmoss said:
not true.......on either count..........imho..........

From the charts and stuff from your site I have to agree.

twistedwankel · Oct 12, 2007

samickguy15 said:
Upgraded motor without upgraded exhaust is kind of like eating a huge bowl of chilli and trying to pass gas through a single pore in your skin.

I don't care who you are that's funny

91foxbod50 · Oct 12, 2007

lmfao

68keyblr · Oct 12, 2007

tmoss said:
not true.......on either count..........imho..........

I know this is anectdotal, but I have a '93 cobra intake on my fresh 331 build...and I have trouble keeping the tires from roasting LOL.

Should have some dyno numbers fairly soon, but I'd estimate it at well over 320 at the wheels.

Cobra intake FTW

88-378 · Oct 12, 2007

Cobra intake is great! Tmoss will be doing mine soon.

ditch those heads and get AFR's. Then get it tuned on the dyno.

68keyblr · Oct 12, 2007

Another option if you don't have the ca$h for new heads is to have those GT-40s ported by Thumper.

I'm running ported iron GT-40's on my 331 that previously were on a 500 HP 302...they can do the job when ported correctly. My 331 pulls like Satan on meth.

There are a few guys around who get 300 rwhp out of stock heads, so you can definitely work with what you have.

Maryland Stang · Oct 13, 2007

2Tone5.0 said:
Cobra intakes arent that great unless you get them ported which is a great deal of$$$. Get the gt40 intake to match the heads.

The GT-40, Cobra and Explorer all share the same lower (EGR differences aside) with only very minor differences in flow on the uppers. The advantage to the Cobra and Explorer over the GT-40 is price and ability to port the upper if desired.

It really comes down to which one you prefer the looks of and budget. I choose the Explorer due to budget and the ability to make it look like the original 5.0 intake since the original intake plaque fits it.

5spd GT · Oct 13, 2007

ttop88 said:
If you have a stock H and get a high flow it will be a noticable differance. If you still have stock mufflers anyaftermarket would make a huge differance. Headers are always good for hp and trq

I would not read much into that. It is not that big of a difference. It helps though.

The Gt-40 intake is not longer being made.

Porting a Cobra is cheap thru tmoss, and good quality

A 65mm throttle body is plenty for 300rwhp.

Porting the Cobra lower, swapping the heads out (after selling the other ones) should get you very close.

Good Luck.

Get me to 300 rwhp

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