Found that throttle only opened 90% on two LSX intakes
Thread Starter
Banned
Joined: Sep 2002
Posts: 1,298
Likes: 0
From: So Cal, CA
Found that throttle only opened 90% on two LSX intakes I installed two lsx's in the last weeks and one gained around 15 rwhp and the other approx 19 rwhp (heads/cam cars).
Today we looked at both cars at the track and found that the throttle was only opening 90% because they were hitting, but you couldnt really tell unless you looked for it.
So time to redyno and hope for some hp improvements...
Today we looked at both cars at the track and found that the throttle was only opening 90% because they were hitting, but you couldnt really tell unless you looked for it.
So time to redyno and hope for some hp improvements...
On The Tree
Joined: Oct 2002
Posts: 169
Likes: 0
From: PARTS UNKNOWN
Originally Posted by C4VetteLS1
I installed two lsx's in the last weeks and one gained around 15 rwhp and the other approx 19 rwhp (heads/cam cars).
Today we looked at both cars at the track and found that the throttle was only opening 90% because they were hitting, but you couldnt really tell unless you looked for it.
So time to redyno and hope for some hp improvements...
Today we looked at both cars at the track and found that the throttle was only opening 90% because they were hitting, but you couldnt really tell unless you looked for it.
So time to redyno and hope for some hp improvements...
LOL, If you read my result's I went through the same thing.Luckuly we found it out on the dyno.You need to cut the throttle Cam with these intakes.Took all of 20 seconds with a cut off wheel.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Youd be surprised that on alot of cars that doesnt gain much power. Its like its only a restriction after a certain rpm (when it needs more air - I think that supports the intake is a reservoir theory) with more and more gains as rpm increase.
On bolton cars Ive seen going from 86% to 100% opening gain onyl 4 hp... AFTER 5500 rpm. Not that id want my TB only open 86 though%
id liek to see what hte before/after power is and the graph, my guess is 13-17 hp with gains starting at/after peak torque.
On bolton cars Ive seen going from 86% to 100% opening gain onyl 4 hp... AFTER 5500 rpm. Not that id want my TB only open 86 though%
id liek to see what hte before/after power is and the graph, my guess is 13-17 hp with gains starting at/after peak torque.
Thanks! So what hits what? The back edge of the throttle cable cam hits the coolant tube? The PVC tube? Looking at my LSX off the car I am trying to imagine, but without the TB installed it's kinda tough....
I looked a little bit closer today....actually took some measurements. And by golly if you guys aren't right. The fitting for the PCV tube is about 1/2' higher & just about that much farther forward than where it comes out on the stock manifold. Amazing nobody else has said anything. I asked Thunder Racing....they are looking into it. Could explain why some cars have produced such dismal results.....
Thanks for posting this guys. I never would have thought about it!
Thanks for posting this guys. I never would have thought about it!