ok, I want to upgrade my 91 rs' exhaust with somthing better than stock. Here's the trick. I don't want to have to mess with it a lot. I want to bolt em in, and put a high flow cat on. I have the single cat exhaust going through 2 3/4 inch pipe to a flowmaster muffler, with dual tailpipes. What is the best aftermarket cat, and what is the best bolt in exhaust from the cat forward? oh, I have a 350 that the desktop dyno predicts will put out between 260 and 310 horsepower. or are my stock manifolds fine for such a wimpy 350?

 

Test

------------------
84 Camaro ZZ4 with HOT cam. Ported Heads, Installed Larger Race-Flo Valves, RPM Air Gap Intake, and 1 3/4" SLP Headers (Best 60',Quarter Mile, MPH) (1.88, 12.91, 106.77)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

get headers, but TES headers are a little small for a 350. Get some with 1 3/4" primaries. SLP has a good set.

------------------
'86 IROC 5-speed
305 LG4
edelbrock performer rpm intake
edelbrock 600 cfm carb
msd pro billet hei distributer
'95 3.23 rearend
hotchkis rear suspension
PST front polygraphite suspension
"speed kills. buy a f@&d, live forever."

 

Not Really. Ive done lots of reading and in Lingenfelters book he mentions 1 5/8 to be ideal. Traxion running AFR heads a nice cam and 1 5/8's is running mid 12's. If you dont have serious intake and exhaust work 1 3/4 will be over kill I think.

 

who is this lingenfelter guy and why does everyone think he knows everything haha. I still recommend 1 3/4 if you ever expect to do upgrades on your engine...plus they flow better

------------------
'86 IROC 5-speed
305 LG4
edelbrock performer rpm intake
edelbrock 600 cfm carb
msd pro billet hei distributer
'95 3.23 rearend
hotchkis rear suspension
PST front polygraphite suspension
"speed kills. buy a f@&d, live forever."

 

especially the SLP 1-3/4" ones. they are VERY high quality. I had Edelbrock TES and i didnt care for them. but then again i went from the 1-5/8" edelbrock headers with AIR tubes, to the SLP 1-3/4" ones without AIT tubes. i think that getting them without the AIR tubes is a GREAT idea if you can get away with it.

by the way..the edelbrocks arent a full 1-5/8". i guess edelbrock thinks headers are like 2x4s...its supposed to be 2"x4" but its actually 1.5"x3.5".

-Brian

------------------
1991 Camaro RS - ultra blue metallic, t-tops
GMPP 350 HO crate engine - 454 TBI, MSD ignition, SLP exhaust, everything is new
700R4 - 2,400 stall converter, vette servo, shift kit
z28boy.cz28.com
Central New York F-Body Association
z28boy@twcny.rr.com AIM - "Z28 Boy"
Daily driver - <A HREF="http://members.fbody.com/z28boy/grandprix" TARGET=_blank>
1998 Pontiac Grand Prix GT</A> - 2 door, black

 

Traxion has SLP 1 3/4" headers. But he's switching to long tubes. 1 5/8" are ideal for a street carb engine but we're talking EFI here, right?


------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

Has anybody had any experience with Summit's $79.99 headders? Are they even worth the cost or swap from the factory?

------------------
Colin Finkle
87 Sport Coupe Camaro, 5.0 L V8

My Car Craft in/out list:

In: Buying my project Camaro and being the first F-body in High School.
Out: While it is being upgraded 6 V6 F-bodies bodies show up!
Out: Looking like a pazie a** follower.
In: Being the only panzie a** with an 8 under the hood!!!

 

Just an FYI. The Edelbrock TES headers have 2 sizes of primaries on their headers. They consist of 1 1/2" and 1 5/8". They felt this provided a flatter torque curve while using short collectors. Which is all our cars allow to fit, unless you get full length headers.

AJ

 

yeah, I am using the stock TBI unit with 55# injectors

 

Not anymore... Their dual-diameter headers have been changed to all 1 5/8". I wonder why... I guess that system didnt work as well as they thought.

 

Sorry, I was not aware that they changed that.

Well if that's true, then I guess they aren't really as bad as everyone says. After all, Edelbrock does dyno every product it sells. I don't think they'd purposely mislead anyone. They have too much of a reputation riding on something like that.

Granted that from what a lot of othere people on here say, the SLP's flow more, but I would just be interested to read a flow bench, dyno, or E.T. comparison of the two. Just to see how much that extra +$100 really helps.

If anyone has any results of any sort of tests like these, then please post the results. Or even a link to the results.
Sounds to me that Edelbrock's biggest problem is trying things that other companies dare not to try. That involves a lot of risk. Sometimes it backfires in their face. Although they didn't get as big as they are by failing all the time.

AJ

 

Seems to me that Edelbrock's biggest problem is quality of their products, and the fact that for just about every Edelbrock component out therre, there is one that is cheaper and out-performs it from another company. Their stuff isn't bad, but it isn't the best either.

 

I don't think they'd purposely mislead anyone. They have too much of a reputation riding on something like that.

is that why every Edelbrock par Ive ever bought turned out to be a pain in the *** to install? The kicker was the Edelbrock 800 cfm carb I tried to put on the Performer olds 350 intake on my 72 cutlass 3 years back. The throttle linkage hit the manifold, even with a 1 inch spacer. I finally returned it and put on a holley 750, went on perfect, with no mods. What is it that edelbrock sells? performer power package my *** .

 

how do you do the quote thing? I'm new