L98 Intake-check it out
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,485
Likes: 566
From: Clearwater Florida
L98 Intake-check it out
About the intake....I bought this from an acqaintance a while back...He purchased it from LPE as a ported stock TPI intake...he didn't know any different....but I did...The base manifold has the Winters Foundry " snowflake " emblem cast in ...the stock fuel rails fit with some minor clearancing and All fits nicely under the hood...It appears that the parts guys at LPE sold some factory experimental stuff without knowing it....this was purchased about two years ago from LPE....I've had it about 8 mos. Along with a cam change from Comp's XE262-H to the XE268-H...I have an older block....This setup got me an extra .4 on an 1/8th mi. track Ran best of 7.82.
SCROLL ON DOWN.......PHOTOS WERE DELAYED.....................
SCROLL ON DOWN.......PHOTOS WERE DELAYED.....................
Last edited by C409; Nov 29, 2006 at 12:02 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Aug 2000
Posts: 14,130
Likes: 7
Cruise-In II Veteran
I can see from the pics the runners and intake manifold size will allow more air into the motor,but since the runner length hasnt been changed any,I wonder what real benefits this will have.
Not being negative,sorry,just know runner length,not always tube and intake size,creates an RPM restricted wall that keeps the TPI from making more HP...if this set up flows alot better than stock,and indeed makes more power,that would be great.
Let me add,I forgot you said it added .4 in the 1/8th so it may be making some better power over stock...any dynos to see if the rpm wall has shifted up from stock?Or did it make more power in the stock band as say compared to as tock TPI?
Not being negative,sorry,just know runner length,not always tube and intake size,creates an RPM restricted wall that keeps the TPI from making more HP...if this set up flows alot better than stock,and indeed makes more power,that would be great.
Let me add,I forgot you said it added .4 in the 1/8th so it may be making some better power over stock...any dynos to see if the rpm wall has shifted up from stock?Or did it make more power in the stock band as say compared to as tock TPI?
Last edited by Aggravated4life; Nov 29, 2006 at 12:06 AM.
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,485
Likes: 566
From: Clearwater Florida
The car is an automatic....beefed a bit....2400 stall ....I put it in drive and punch it ...let the trans do its own thing....shifts 1-2 at 4700 rpm and 2-3 at 5000....the car is extremely consistent...wish the driver was too!....runs 1.70-1.75 60' times and is real consistent in the very low 8.0s- 8teens depending on air and track temps....Florida you see....the 7.82 run was in 58 degree weather.....EFI cars do love cold air....with the stock TPI manifold the best ever time was an 8.15 but was more likely to run 8.40's....this is all with the same set of MT drag radials at the same 1/8 mi strip....Sushine in Clearwater FL
Team Owner
Joined: Mar 2001
Posts: 30,856
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Length dictates the RPM that the ram effect operates.
But the volume of the runners is really going to help you out. The TPI was only meant for a 305. They should be D shaped, to help out the short radius side of the runners, GM used a bent tube, hence they're being round, but just about all the aftermarket ones were cast, so they could have took care of this.
But the volume of the runners is really going to help you out. The TPI was only meant for a 305. They should be D shaped, to help out the short radius side of the runners, GM used a bent tube, hence they're being round, but just about all the aftermarket ones were cast, so they could have took care of this.
Thread Starter
Le Mans Master
Joined: Feb 2005
Posts: 6,485
Likes: 566
From: Clearwater Florida
L98 Intake
Yes the EGR passages are there but were blocked with epoxy before I got the manifold....Theres not much meat left in the tubes...but plenty in the base manifold.....the plenum had epoxy ( the gray areas ) under the tube mounting area for plenty of gasket sealing surface....making the gaskets is time consuming but worth it !