josh.davis

Need longtubes, buy the new edelbrock intake with Modular Head shops custom elbow. Then put a 125shot on it.............. then post up some new numbers.

boduke0220

looks like you just threw a combo together and didnt look at how anything worked with the other.

98redstang

+1 ive heard from numerous people that the typhoons suck.

MU71L4710N

typhoons have been known to decrease horsepower in blown and NA applications. they have fitment issues and everything else. they are pure garbage.

0949er

LTs would def help you out with those cams+heads. Shortys are worthless.

By comparison, with pretty much full bolt ons (like urself) minus heads (and same cams) I put down 288rwhp

b96gtman

typhoon does suck but in our cars Longtubes wont make that much power guys! I have watched countless dyno tune sessions of cars getting tuned with just longtubes bein the difference and the biggest gain i saw was with the edelbrock victor race step tube headers and they made 25rwhp. Hooker supercomps,bbk's,Macs maybe worth 9rwhp. Maybe. Ive seen my buddys car make 2rwhp with a pair of hookers on his high compression na car. ****, look at Kenne Bells web page, they dont recomend longtubes at all because the gains are so minimal for the money u spend to put them on and buy them. I think Dynos are more for tuning and u should let the track determine what u really gain and put down. like Cliffy said above Your injectors and Maf are a little big and personally i think u need ore fuel and a new filter. sell the typhoon and go back with the stocker and use the money to buy a fuel pump.

b96gtman

And another thing, Flowmasters SUCK BIG TIME!!!! They make NO power at all and sometimes loose power. they may sound great but the Muffs that make the most power ive seen are Magnaflows and Borla's. Get a pair of those and i BET u gain some needed power that u have lost through the Flows for sure!! Even Nick @ MHS says the same about the zMuffs ive stated.

MU71L4710N

incorrect. kenne bells website says not to have longtubes because the canned tune they mail out does not correct for longtubes and causes blown engines. if longtubes had zero effect on the car over stock headers, kenne bell would not have to have this disclaimer. there are people on this forum who have blown their motors with kenne bell's tune because they did not listen to the "no longtube headers without custom tune" part.

longtubes vs. shorties is good for HP at the top of the RPM band. so the way i see his car, his typhoon is likely causing a power loss, and having shorties vs. longtubes is not helping his peak horsepower numbers. if he were to switch to longtubes, he would loose roughly 20HP in the middle of his RPM band, but would pick up HP at the peak of his power band (which is where the peak HP number everyone makes such a big deal comes into play). so switching to longtubes and putting a real intake on his car, and possibly a few small supporting mods (since cliffy said his maf and injectors are way too big), he should be into the 300s. people with just cams and no stage 2 heads are putting down 285-295 range.

i can show you a dyno graph too. they did stock, shorty, and longtube headers compared on the same car.

the stock was baseline. forgetting the peak power numbers for a minute (and these numbers are not exactly accurate im going off memory but you see my point).

with equal length shorty headers, at 3,000rpm the car gained roughly 25rwhp more than stock headers at 3,000rpm. at 3500rpm, the car had roughly 20 more rwhp than stock headers at 3500rpm. at 4,000rpm the car had rougly 15 more hp than stock headers at 4,000rpm. the point where the car hit maximum power, equal length shorties had only 2-3rwhp over stock. this is where the PEAK horsepower number was taken from, so if thats ALL you go by, you think you only gained 2 horsepower...when in actuallity that is not correct because you had significant impact on other parts of your RPM band, but the peak horsepower numbers do not show this.

with longtubes, the car actually had a little less horsepower than stock in the low part of the rpm band. however, at 3,000rpm it had 2-3 more rwhp over stock headers at 3,000rpm. at 3500 it had 5rwhp more than stock headers at the same rpm. at 4,000rpm it had 10 more rwhp over stock headers at 4,000rpm. so on and so forth until the point where peak horsepower was made, the longtubes made roughly 20-25 more rwhp, so this 20rwhp was that over stock. so say with stock headers the car put 250rwhp PEAK. with equal length shorties, it was roughly 252rwhp at PEAK. with longtubes, it was roughly 270rwhp at PEAK.

cliffyk

I was looking at the Patriot SII head specs, they have a 46cc combustion chamber--the OEM heads are 44cc. A very rough calculation¹ says that with the stock pistons/lower end this would have cost about 0.4 off the compression ratio.

Great for f/i, not so good for n/a...

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¹ - the stock CR is 9.4:1 with a swept volume of 575.1cc (90.2² * pi * 0.25 * 90.0 * 0.001), so the "squish volume" is 575.1 / 9.4 = 61.2cc.

Make that 2cc more and the compression ratio becomes 575.1 / 63.2 = 9.01:1.

tbirdscwd

I was always told stock CR on PI engines was 9.7:1??