Hey Everyone, I just installed my 1-3/4" Schoenfeld longtubes, and my 3" X-PIPE true duals, on my 355 SD TPI. I have 24# injectors, edelbrock ported base, 58mm ACCELL T.B., HotCam, and custom Howell PROM. Car ran extremely rich diretly after installation, it POPS very loud from the excessive richness. Could it be the drastic reduction of backpressure? Is there a way to rectify this problem, by timing and TPS adjustments? Deep down, I know that I will need to get another programming of my prom, my PROM BURNING stuff haven't got here yet. The car doesn't set any codes, just the richness and popping. Any help would be GREAT APPRECIATED. Thanks everyone.

EDIT: these are my exhaust assembly, so that you know.

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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed

[This message has been edited by 88SS6SPEED (edited January 31, 2001).]

 

02 sensor might have got messed up one the header install. Just a thought. ~Arnold

 

You got mail.

 

Probably the O2 sensor. You definitely need a heated O2 with long tubes or else the sensor will not get heated enough to operate correctly. It will cause more fuel to be dumped into the engine than is necessary.

Tim

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• Program your own PROMs!. Read my article to get started!
• Research and Experiment before asking questions.
• This is not a chip store. Go to the classifieds if you want someone to sell you a chip or give you a BIN.

TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's with bigger cam, bigger stall, and bigger exhaust.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org

 

Just curious cause I have a 87ss also. Does the x go under the crossmember? Im sure you have a different crossmamber w/ a t56 but mine only has a single exhaust hump in it.

 

I'd think maybe O2 also. BTW- What are those cats off of? THX!

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'91 GTA:
www.fbody.com/members/91WS6GTA

 

Ashley,
I've also heard that with long tube headers you will need a heated O2 sensor. Nice looking exhaust. Wife lets you play car in the living room eh? LOL


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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

Hey 87Z-ya, GTA91, and Rob, I already have the HEATED O2 sensor, it is a brand new BOSCH P/N 13077 unit. 87Z-ya, I have a custom RACING CROSS MEMBER from G-FORCE PERFORMANCE, I sent him the dimensions to modify it for the T-56 mount. GTA91, those CATS are 3" MORE-FLOW units, that I bought from Internet Racing Supplies. I only paid $99.99 each, http://www.racenet.net Look at the 93-97 F-body exhaust section for them. HTH's. 87Z-ya, check out my WEBSHOTS WEBPAGE to get a better look at my entire setup and the CUSTOM CROSSMEMBER. I will be adding new pictures of the entire headers and X-PIPE installation on Sunday. Here is a picture of "SSYNERGY" HTH's BTW Rob, that photo was taken at a Friends HOUSE


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88 Monte SS 355 TPI/LT-4 HOT CAM/AFR Hydra-rev/ T-56 6-Speed/1-3/4" full length headers/3" X-PIPE assembly/ 8.5" G-80 rear with 3.73 gears.
community.webshots.com/user/ssynergy
www.y-t-g.com/88monte

[This message has been edited by 88SS6SPEED (edited February 01, 2001).]

 

I'd focus on that Howell chip! They are not the best custom chip burners I've seen. I went through at least 5 "custom" Howell chips for my TBI a few years back. Never again!

Try Ed Wright's Fast Chips.