Ive just got my bird back on the road in time for my wedding, before it would rev to 4K then stop like it hit a brick wall, its had a timing chain + fuel filter but i havnt had the chance to sort any timing issues as my stuipid AIR pipe is over my dizzy hold down bolt and i cant get to it ( AIR system coming off soon ! ) but it dosnt seem bad

It now accelerates round to 5.5K then hits a wall

i seem to remember a 92 i had reving/ pulling much further round ?

what does yours do ? im possibly thinking valve float on old lifters.....

 

They will hit a wall 4500rpms due to intake manifold/exhaust design. Its a huge bottle neck. 5500rpm is your redline and thats because of valve float. The springs cant handle revving that high. If you want to go higher, you need better springs and open up the intake/exhaust to allow for better breathing.

 

ok cool so the fact it flies round to 5.5 is good eh ? guessing my custom plenum has something to do with that,i must take some pics of it now


https://www.thirdgen.org/forums/v6/5...take-work.html

 

somone here actually posted stock and ported flow numbers for the stock intake.i just dont remeber who i do rember it was for a school project though. ill have to see if i can dig them up, but iirc the stock intake isnt a bottle neck

 

hi, i too remember that thread ! .....

 

That was me actually, lol. The big restriction in the intake is when it takes a 135 degree turn from the upper plenum and goes down each runner, it really narrows down. You can see the numbers went up a decent amount just from gasket matching.

https://www.thirdgen.org/forums/v6/3...ed-intake.html

 

i thought it was you i just wasnt sure this thread nees to be bumped back up so its easy to find, on another nte one of my prototypes just went out for testing a few days ago so i should get back some numbers soon

 

itll be interesting to see how bad your intake stomps the stock one into the ground, lol.

 

thew pizza box kills the stocker and moves peak power up about 1000 rpms, this new intake is adjustable u can swap out the runners at will so u can actually tune were peak power occurs.

iintakes if i go into production with them will come with a 3.5 inch a 4.5 and a 6 inch long runner

 

so ur saying my 6500 **** ponit is bad and my 7000+ revs are no good o **** still runs fine ?

 

What?

 

I think he's asking if shifing at 6500rpm is just a waste. And yes. You'll probably be faster if you shift earlier. Are you actually making any power up there without valvefloat?!?! What springs are you using?

 

stock as far as i know motor is not that old is a 3.4 and i seam to pull more in the hier rpms dont think i have ever had valvefloat my lower rpms seam to suck any more

 

I find that hard to believe. My 2.8 could hardly heave itself to 5500rpm when it was stock.

 

na i get a vin up

 

??? I can't figure that one out. Translation?

 

Yeah im a lil lost on that one too. Spelling, punctuation and grammar help out a lot dude