What is your setup? Did you like the results? How much of an improvement did it make?

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1986 CAMARO Z28 -> 151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> Homemade ram air, B&M shifter, Extreme Energy 230/236 cam, Holley Street Dom intake.

 

Remember that the port height is raised on the Vortech heads, and if you add the L98 intake you'll have a huge mismatch that will result in poor airflow into the head.

My guess is that L98/TPI Vortech equipped engines are not very well received as far as performance goes. Scoggin Dickey is coming out with an L98 Vortech/Fastburn inake manifold that should solve this problem. You should be able to utilize these head designs with minimal problems.

It's due in early 2001.


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Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.

 

It's Vortec not Vortech.

 

I've heard that the Vortec heads are not a wise choice for the TPI as for the reasons mentioned above. AFRs, Edelbrocks and such heads are better for the L98 motors

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

Next on the list: LT4 HOT Cam

 

If you guys could read you would see that I am not using a TPI =-0

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1986 CAMARO Z28 -> 151,000 original miles, 43,000 on 89' vette 350 block, Holley 650 DP, Weiand intake, 1.6 rockers, 1 5/8" headers, no cat, 2 1/2" Flowmaster catback, Mallory coil, March pulleys, T5 with 3.35 1st gear and 0 miles, 90% Centerforce clutch, 3.73 posi, Eibach 1" drop springs, Spohn LCA's, Spohn adjustable panhard rod, Subframes connectors, polyurethane swaybar bushings/endlinks, 2 12" Sound Streams, 2 Infinity 6X9's, 2 Pioneer 6X9's, 800 watt Lanzar Vibe amp. ET 13.22@ 106.4MPH Next mods-> Homemade ram air, B&M shifter, Extreme Energy 230/236 cam.

 

I have a mag with some dyno tests. They were compareing the L98s and vortecs to the 23* Trick flows. The Vortecs made 16 more horsepower than the L98s. Both were stock heads no porting, the dyno mule was a 350.

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Black 90 IROC, L98, A4, 323 gear. SuperRamed 406 in the works!

 

Grab a pair of Vortec's and an Edelbrock Performer RPM intake made for Vortec's and I guarantee you will be happy with the results for the price you pay. It's a really cost effective way to go fast. You could always do a little porting to unlock even more power

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1982 Camaro Z28

trying to make it worthwhile for the spring....

Check the website for progress http://members.fbody.com/Pro82Z/

 

you're running a really great time, BTW...keep up the mods!

 

I dont know if 16 horsepower is a lot of bang for 400 dollars!! I guess I'm decided now. No Vortecs for me... AFR 195s all the way

 

i know this a dumb question, but are all 350s L98s?

 

Nope, only 350 TPI's are L98s. That's why everyone assumed that he had TPI instead of carbed.

 

so if its carbed its the tbi? and whats the difference in the two...thanks for any help

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currently - 1999 camaro ss - 6spd,hurst,K&N,cutout,nittos

future - 1986 camaro iroc z28- all kinds of goodies

 

tbi looks like a carb and kind of acts like one without injectors on each cylinder, but it's still a form of fuel injection.