Im a little disappointed with the results. I was hoping for a little more from lt headers and ported/siamesed plenum and runners.

Old Dyno:
212.0rwhp/323.1rwtq

New Dyno run:
1st run:

218.9 rwhp
330.5 rwtq

2nd run:
219.5 rwhp
328.2 rwtq

As you can see, the gains weren't all that impressive, but I did notice something about the old and new dyno results that made me smile a little. On the old dyno, my hp/tq at 5k rpm was a measly 170/175 (approx). On the new dyno. hp/tq at 5k was 185/195. Looks like the purpose for the ported/siamesed plenum/runners and LT headers was successful.

Was this about all I could hav expected out of the mods? If so, where is the hp restriction now? My iron heads? Cam? Stock catback? If I dual out the exhaust, where and what kind of gains do you think I would see and would it be worth the $350 to have it done?

Here are some pics.

Old dyno:


New dyno pics:









[Modified by VetteNoob, 9:46 PM 1/11/2003]

 

cam, heads, intake, that is why its called a tuned port change those three and you will pull 290-310 hp and 320-340 torque good luck :cheers:

 

i wasnt that far off with my 225 hp 330 torque i predicted :cheers:

 

Oh and my AFR was around 12.8 - 13.5 out the exhaust.

CORKVETTE1-
Can you explain a little about losing the hp I gained with the intake work? Why does it work that way?

 

well dude before i got my super ram i did a lot of research on various intakes and came to the conclusion the siamese plenum runners was not a very good idea in fact i only saw one test where it gained any horsepower over stock but it was negated from a huge loss of overall torque believe me i also found out the hard way when i first started messing with these fuel injected cars i had my current heads ready to go which they were originally on my old camaro which made over 500 hp and did the qtr in 10 second et and decided to put in a small cam but decided the stock intake couldnt hurt me that bad but totally stock the car went 14 second flat so i thought easy 12s for the heads and cam right well took it back out and ran 13.6 et i think my jaw droped thats when i started doing my homework on these tpi engines it wasnt as easy as my carbed setup was and thats when i figured out what tpi really stands for tuned port intake it is matched from the air cleaner lid to the maf to the plennum to the runners to the bottem intake to the heads nothing relly flowed all that well so to compliment the heads and cam swapped i chaged over to the super ram intake swap and instantly went from 13.6 down to 12.6 and after some tuning my 350 best of 12.4 et down to where i am now at 11.1 et with my 406 and those same heads :lol: now i am not saying the super ram is worth the 1 sec improvement but it let the head and cam then work for the improvemant so to you i am saying put on some heads a cam and either long tube non siamese runners or super ram and wath those numbers go up and your et go down :cheers:


[Modified by CORKVETTE1, 12:00 AM 1/12/2003]