Opinions On 'Top End Bolt Ons'

Makdaddymac said:

oh yeah thats my plans..with headers whose to say i ant reach 300hp though??? which is my goal......

so i was thinking headers and maybe some injectors cause the 19lbs are only good for about 275hp according to my calculations..cant do injectors without maf im told. so its headers,maf,then injectors which should put me well over 300whp

but i will start with the headers which must be the most restrictive part of my combo

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you'll be pretty close man. any work done to the heads? my little e7's have about as much work as you can do to them. full port job with 1.94/1.6 valves. as is, my heads flow better than the aluminum "turbo swirl" gt40x heads (216/149 to my 218.9/154 at .500 lift with STOCK valves), and my afm cam has .512 lift, so it takes them to their fullest potential. stock e7's are 156/116, and from what i've read, gt40p's flow 196/139 stock. the thing about the P's over e7's, though, is you have more room to grow. honestly, if you don't have any work done to them and your car is running right, right now you probably have (retracting my previous estimate) 260-270 to the tire, and if you get some new headers, throttle body, and any lean issue the SD computer might cause in check, you will definitely be scratching the backdoor to the 300 mark, but i'm going to say you'll still be just under it. i seriously doubt you'll hit 11's, but you'll for sure be deep into the 12's with some decent driving and traction. you were comparing to 25th and his car, but 1. he's a badass driver, and 2. he was on slicks on the 12.5 pass.

JMO

Retarding the cam moves the power band up...

Also, 300 rwhp and 11s takes more than just point it down the track and floor it. We had two GT40 cars go 11s, both are 3100 lbs or so, had mid to low 1.6 60's, and went 11.96 @ 111 and 11.97 @ 111, both with right at 300 rwhp. The average 300 to the tire car is a mid 12 second car. For a full weight street car with an average driver at an average trrack to run 11.99 or better, I would say 350 rwhp would be a number to shoot for.

It can be done with less, but it takes a lot of practice.

i say get the gt-40s or similar (thumper, p heads etc)

good intake and keep a stock cam, maybe retard it a few degrees. should make awesome power for the street. dont get caught up in HP numbers.

dont start sacraficing low and mid range power to gain some higher RPM power. especially if the car is street driven alot. its not all about max power.

to me a well built gt-40 headed car with stock cam and intake would make good power and have plenty of low end and be killer for a street car, still pull real good but not so much power it just boils the tires. would be alot more fun to drive than a high revving engine making its best power 6k+ having sacraficed the low end, wouldnt be as fun on the street IMO.

keep the low end power. and later throw KB and then you'll have an absolute torque monster, then you better start saving for tires.

Foxfan88 said:

i say get the gt-40s or similar (thumper, p heads etc)

good intake and keep a stock cam, maybe retard it a few degrees. should make awesome power for the street. dont get caught up in HP numbers.

dont start sacraficing low and mid range power to gain some higher RPM power. especially if the car is street driven alot. its not all about max power.

to me a well built gt-40 headed car with stock cam and intake would make good power and have plenty of low end and be killer for a street car, still pull real good but not so much power it just boils the tires. would be alot more fun to drive than a high revving engine making its best power 6k+ having sacraficed the low end, wouldnt be as fun on the street IMO.

keep the low end power. and later throw KB and then you'll have an absolute torque monster, then you better start saving for tires.

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... Says the guy with aluminum heads and an aftermarket cam.

I love my E7 and my brother GT40P comboes for the street. They arent the fastest around, but if your not street racing, they are fun to drive!

Makdaddymac said:

what degree should my timing be at?

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Ignition timing? Should be advanced to about 14 degrees BTDC, though some cars can take more. Running premium will allow you to advance it more.

Theres no right or wrong answer there, wherever it makes the most power.