TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

heads?

Thread Tools
 
Search this Thread
 
Old Mar 19, 2009 | 01:04 PM
  #1  
wgripp's Avatar
Thread Starter
Supreme Member
iTrader: (1)
 
Joined: Apr 2005
Posts: 1,165
Likes: 1
From: Valdosta, GA
Car: 1991 Trans Am GTA
Engine: L98(5.7 L TPI)
Transmission: 700r4(A4)
Axle/Gears: G80 RPO, 3:23s, Auburn Racer's Diff
heads?

I am going to have my TPI plenum/SLP runners ported. I'm going to throw in a Lingerfilter 219/219 cam.

I want to upgrade the base plate while I'm at it. Should I go with a Vortec heads baseplate or a baseplate that accepts standard heads?

If I go with a Vortec baseplate, I'll need to buy new heads. What heads do you recommend? Summit is having a sale on their brand heads.

http://store.summitracing.com/partde...5&autoview=sku

But, I have no idea if these are any good.

Any ideas?

Thanks,
Bill
Reply
Old Mar 19, 2009 | 08:26 PM
  #2  
birdtojag's Avatar
Senior Member
iTrader: (1)
 
Joined: Jan 2007
Posts: 684
Likes: 1
From: Mesa AZ
Car: 87 Firebird, 90 bird coming soon
Engine: 355 Chevy Vortec Heads TPI, LT1 inj
Transmission: 700r4
Axle/Gears: 2.77 posi 9-bolt
Re: heads?

Check port size and numbers. Talk to a customer service rep from Summit and they will help you out with getting what you want to accomplish.
Reply
Old Mar 19, 2009 | 10:34 PM
  #3  
Dyno Don's Avatar
Supreme Member
25 Year Member
iTrader: (7)
 
Joined: Mar 2000
Posts: 5,703
Likes: 132
From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: heads?

Bill:
Run as far and as fast as you can from the Vortec base plate.
That is the biggest piece of crap Edelcrock ever made.

Just get regular bolt pattern heads. But stay away from cheap ones.

Here read this to see what you have to do to make it measure up to their regular base plate.
https://www.thirdgen.org/forums/tpi/...pi-intake.html
Reply
Old Mar 20, 2009 | 01:30 AM
  #4  
wgripp's Avatar
Thread Starter
Supreme Member
iTrader: (1)
 
Joined: Apr 2005
Posts: 1,165
Likes: 1
From: Valdosta, GA
Car: 1991 Trans Am GTA
Engine: L98(5.7 L TPI)
Transmission: 700r4(A4)
Axle/Gears: G80 RPO, 3:23s, Auburn Racer's Diff
Re: heads?

Don,

I will be sending you a M.O. for your headers sometime this week.

Do you reccomend edelbrock baseplate 3860 or 3861? Or should I go with another company altogether?

What do you think of this cam:

http://www.lingenfelter.com/mm5/merc...egory_Code=C30

Thanks!
Bill
Reply
Old Mar 20, 2009 | 01:47 AM
  #5  
Kevin91Z's Avatar
Moderator
25 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: heads?

The 3860 is configured for both 86 and older (and Corvette heads), as well as 87 and newer intake bolt patterns.

The 3861 is for 86 and older, and Corvette style heads only. I'd get the 3860 so its compatible with everything.

The Lingenfelter cam was great back in the 90's, but there are lots better and more modern camshafts out there now. For one is the Comp XFI268HR-113. But it requires aftermarket heads; it will not work with the stock heads. For that matter, neither will Lingenfelter cam.

For heads, either the Trick Flow 23* or the AFR Eliminators seem to be the hot setup right now.
Reply
Old Mar 20, 2009 | 10:19 AM
  #6  
wgripp's Avatar
Thread Starter
Supreme Member
iTrader: (1)
 
Joined: Apr 2005
Posts: 1,165
Likes: 1
From: Valdosta, GA
Car: 1991 Trans Am GTA
Engine: L98(5.7 L TPI)
Transmission: 700r4(A4)
Axle/Gears: G80 RPO, 3:23s, Auburn Racer's Diff
Re: heads?

Would AFR 195 Eliminator #1040 65cc chamber L98 heads work?

If the rest of the motor was stock, how much HP gain would I see? Will this give me any problems (loss of compression since the build will be mild, etc)?
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
Dec 10, 2019 07:07 PM
92projectcamaro
Engine/Drivetrain/Suspension Parts for Sale
11
Jan 18, 2016 08:00 AM
FormulasOnly
Tech / General Engine
7
Sep 6, 2015 10:42 AM
z28guy134
Engine Swap
1
Sep 1, 2015 11:50 PM




All times are GMT -5. The time now is 06:44 PM.