i would like to hear the pros and cons on these for and 86 TPI IROC
thanks

 

Go with the SLP's, their quality is much better, and IMO are the best. 91Z will probably be coming to say something on this also since he likes this subject so much, LOL.

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89 RS

Looking For:
87 IROC-Z28 350 TPI

 

I have been very happy with the TES headers, the only reason why I would spend the arm and leg SLP charges you is if I wanted the 1 3/4" size headers, if not, the TES are a great bang for the buck.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End with 2.77:1 Gears.

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Catco 3" High-Flow Catalytic Converter, Hooker 3" Aerochamber Cat-Back System, Transgo Shift Kit, Performance Resource Chip, Accel Ignition, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

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

 

I definately noticed a power gain and sound change when I first put the TES on my old 305, the only bad thing is they rust quick, if you get them I recommend getting them coated.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
3:73 Richmond Gears and 3" Exhaust
"There is nothing more addicting than speed"

 

Go with SLP. You get what you pay for. The more I read and talk to people, the less faith I have in any of Edlecrock's products.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, TH350 tranny with 2500 stall.
SLP 1 3/4" headers

 

There's a set of TES headers on both my 87Z and now my old 86 IROC (my brother's now). I have to say I have been very happy with them for the cost. Are SLP's better quality wise? Probably, are they worth the extra $$$? Not to me... Performance wise you're not going to get jack with one over the other unless you get 1 3/4" SLPs.

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray

 

I agree for the most part with Ray and the others. I have the Tes system and they are the best set of headers ive owned. A set of 1 3/4 primaries on a TPI motor is a mismatch IMO. The TPI intake is a torque based design. Ive read to many dyno sheets to ever use 1 3/4 primaries on a street 350. On a Miniram motor yeah,thats a whole different RPM range. But on a highflow LR or SuperRam motor for that matter. I think its a mismatch IMO.

Ive read buildups on 400s that went with a set of 1 5/8 over the 1 3/4 priamary headers.
Because the overall horsepower and torque went down. There was a slight gain at the top. when the larger primary headers were used. But the over all was a loss,IM talking about 450 horsepower small blocks.

Just my 2cents!

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

 

They get the 1 3/4's to try to get more upper RPM HP range from the TPI even if it does take some TQ in the process. As said, TPI will always make better TQ than HP anyway, but u can always make up for TQ with a Torque Converter.

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89 RS

Looking For:
87 IROC-Z28 350 TPI

[This message has been edited by IROCZTWENTYGR8 (edited July 08, 2001).]

 

I don't know, either because my y pipe is bad or what but I gained only 1mph after tossing my headers on. Check my sig, I know my 60 ft wasnt great but mph should pick up. I would go with SLP 1 5/8.

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1990 G92 5spd LB9 - 3.42 80,000 miles

Accel Ignition/Wires (8.8mm), Advanced Timing, TB Bypass, Ported and Gasket Matched Plenum, Synthetic Motor Oil, 160 Thermo, TPIS Airfoil, K&N Air Filters, Centerforce I Pressure Plate and Clutch, Edelbrock TES Headers, Dual Cats, Edelbrock RPM Series Catback, Homemade Ram Air, Bosch +4 Platinum Plugs

14.4 @ 94mph w/2.0622 60ft (w/o headers and catback)

14.426 @ 96.19mph w/2.167 60ft(w/headers and catback)

 

Also, what are we talking here, a 305 or 350?? If its a 305, 1 5/8's. For a 350 1 3/4's.

------------------
89 RS

Looking For:
87 IROC-Z28 350 TPI

 

The group purchase price makes the SLPs pretty competitive with the TES though...

 

Sorry, but have to disagree with ya. I started with Edelbrock headers on my old 305. Swapped over to SLP 1-5/8" Tri-Y headers and picked up 1mph and knocked 2 tenths off my ET. Track conditions were very similar too. The flanges on the SLP's are much better quality and actually measure 1-5/8". Well worth every penny....especially since I bought the SLP's on clearence for $399!! I'm still running them on my current motor but Hooker LT's are going in soon!


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David Tuschhoff
1991 RS/Z28 Camaro M5,
Fuel injected 355ci V8.
12.55 @ 111.6mph 1.94 60'
My f-body page!

 

i fail to see the poinnt in spending $400 for painted headers.

steel slp all the way.

 

I spent $300 for my Edelbrock 6872 TES from TPIS. I then used stripper to remove the black paint, which Edelbrock clearly states in their instructions is for shipping purposes only. I then repainted them with VHT1600 aluminum paint ($12) and cured them in an oven.

That was two seasons ago, and the headers have not discolored nor rusted. I'd say it was a pretty good value at a total investment of $312 bucks.

------------------
Daniel Burk
View my third-gen hobbyist performance page!
View my reader's ride!
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff., 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.
Best of 14.039 at 100.82 MPH in Stanton, MI
New!Full 1LE brake upgrade! Details at website above.

 

Please please please use the search feature. This topic comes up all the time, and the same arguements get thrown around. I'd lock this if I wasnt in a good mood.

I dont like Edelbrock's header design. They use a lot of weld on the inside which reduces the port size. You dont want your hot exhaust gasses to shrink as they try to fit in the header.

Lots of people have Edelcrock's headers because they are cheaper, and say they are good because they've never tried anything else. However, I have not heard ONE PERSON say they they regret switching from Edelcrock to SLP.

SLP's 1 3/4" headers do not cause you to lose torque. I didnt. In fact I gained 37 TQ at the rear wheels when I added the LT4 HOT cam and TPIS intake and runners to my SLP 1 3/4" headers, over a ZZ4 cam, stock ported intake and runners, and SLP 1 5/8" headers. However, if all you're going to do is headers and exhaust on your street car, any 1 5/8" headers are fine, SLP, Edelcrock, Hedman, Hooker, Dynomax, etc. However if you plan to build up your 305, 350, 383, or larger, with nice heads and cam, your best choice is the SLP 1 3/4". They're the best emissions legal header out there for high performance engines in our cars. If you dont have emissions to worry about, get long tube headers.



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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
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