I just added the MSD coil and wires and now plan to move on to fase 2 of my upgrades air flow. I am going to get a K&N cold air kit from who i don't know. And was wondering since my car is pretty stock a 52mm is not worth it at this time but is a spacer worth it?

 

I think spacers are good for TBI's and carb engines only

What would a spacer do on a TPI?

 

Most likely would reduce his power band even more.

-- Joe

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1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters, Summit 1.5 roller rockers, World Products Sportsman II
2.02/1.60 heads, Edelbrock TPI Intake, Cloyes Double Roller, timing chain, Mellings oil pump: 13.5 @ 100.23 MPH

Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs gauge, A/F ratio gauge.

http://www.joesperformance.com

-- Joe

 

If you have a tpi your runner leigenth is long enough I wouldn't put one on your car. You would be better served saving the money and spending it morewisely somewere else. Look into the tec-boards and find out what tpi mods are reccomended or do a search on the this board for the same subject.

 

Sorry i ment to say airfoil.

 

Save your money, man.

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355 c.i.
Dart 180 Heads
Lunati 224/224 cam
Harland Sharp 1.5 rockers
Performer RPM Manifold
Holley 600 cfm double pumper
Hooker Super Competition Headers
Flowmaster Exhaust
Competition Engineering Sub-frame connectors
Tremec TKO
Pro 5.0 Shifter
GM posi 3.42 rear
Hurst Roll Control
13.9@102
http://www.geocities.com/thetpiguy/index.html
chemjoker@aol.com

 

I looked in the tech area under suggested mods for TPI and the Airfoil is on there as one of the upgrades to do. However i hear mixed ideas when it comes to throttle on here.



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89 Formula WS6 w/ TPI 350
MSD blaster coil and 8.5 mm MSD's
K&N filter

 

about the spacer idea... i was thinking of getting a product called airaid.. its a spacer with a helical bore in it, so it spins the air as it goes through and picks up more fuel onthe way into the cylinder. Depends if I go NOS or not... Which may be decided in the next week due to a 300dollar (candian) price on a NOS sytem

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1988 Pontiac Trans Am GTA L98 5.7L, Black on Black with 114,000kms.

Best ET 14.559 @ 95.25MPH
Custom 3" Stainless Exhaust Y-Pipe back (High flow Cat and Flowmaster Mufler)

 

Those spacers are a total waste of money for TPI engines as they don't affect the runner length, fuel atomization, or anything else besides giving you a lighter wallet.

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Greg Westphal
'87 IROC 355TPI/A4

 

TPI is a dry flow so unless you setup NOS at the throttle blades who cares if your air looks like a tornado, it will do nothing for you but as said above lighten the wallet, If you want I can take a drill and grind up your TB and you can give me the money instead.

Seriously, Airfoil is mixed results at best and a spacer is useless. save your money for some heads.

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1989 Trans Am GTA, Gutted air box, K&N, Koni Sports

 

I read an article in a hot rod type book
a while back about those little propeller
spacers.

They were popular in the 50s and 60s, and
were proven to do absolutely NOTHING
as well.

-- Joe

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--------------------------------------------------------------------------------------------------------------------------------------------------------------
1989 Formula 350 4-bolt mains, Forged .030 TRW pistons, SLP 51010 Roller Cam, Comp-cams roller lifters, Summit 1.5 roller rockers, World Products Sportsman II
2.02/1.60 heads, Edelbrock TPI Intake, Cloyes Double Roller, timing chain, Mellings oil pump: 13.5 @ 100.23 MPH

Since close of track : Ported SLP runners, Ported Plenum, AFPR, Autometer 100lbs gauge, A/F ratio gauge.

http://www.joesperformance.com

-- Joe

 

I doubt you'll gain any noticeable power by adding an airfoil. The only thing I noticed when I added mine was that my throttle response was slightly better... but that's it.