DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

anyone with Ported plenum, base and SLP runners, what base mods made to chip?

Thread Tools
 
Search this Thread
 
Old Apr 27, 2002 | 07:15 AM
  #1  
monte-ss's Avatar
Thread Starter
Member
 
Joined: Apr 2000
Posts: 398
Likes: 0
From: Salisbury NC
Car: 87 Monte Carlo SS
Engine: 89 IROC 350 TPI
Transmission: 700R4 rebuilt w/TCI kit
Axle/Gears: 9" from 57 ranchero unsure gears.
anyone with Ported plenum, base and SLP runners, what base mods made to chip?

Im just getting started on the chip burning process, and I was wondering what initial mods were made in a highly ported Base, and runners, I also have the stock 89 L98 cam, 1.6 RR's and vette 58CC alum heads. Just something I can base off of to work with.

thanks
Reply
Old Apr 27, 2002 | 09:20 AM
  #2  
Grumpy's Avatar
Supreme Member
 
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Re: anyone with Ported plenum, base and SLP runners, what base mods made to chip?

Originally posted by monte-ss
Im just getting started on the chip burning process, and I was wondering what initial mods were made in a highly ported Base, and runners, I also have the stock 89 L98 cam, 1.6 RR's and vette 58CC alum heads. Just something I can base off of to work with.

thanks
You'll want to start with a ARAP, a search thru the list archives will give you a rough idea of what to do (where to set the switchs).
Then you'll want to take a ton of timing out. The 58cc AL heads don't need much timing to run really well, 28d (TOTAL) should be close.
Reply
Old Apr 27, 2002 | 05:20 PM
  #3  
Matt87GTA's Avatar
Supreme Member
 
Joined: Mar 2001
Posts: 2,047
Likes: 0
From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
Well I have that intake combo but I also have TFS 23* heads and the LT4 Hot Cam.... Like Grumpy said, I started with the ARAP. I actually did exactly like he said and pulled a bunch of timing out throughout the main spark table initially due to some part throttle knock I was getting. But since then I have gone back and added some back in - especially in the higher LV-8s and WOT areas. I think my TFS heads 'like' more timing than those L98 heads will want though, so you should listen to Grumpy on the timing. You will also want to tweak the injector constants and your rail pressure to get some fairly steady part throttle 128/128 BLMs. So you should get the ARAP bin, play with the fuel stuff, and back off the timing some until you get comfortable with your BLMs. That should get you started. You can find the ARAP bin at Craig Moates site.

Good Luck,
Matt
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fonzie85
Exterior Parts for Sale
39
Mar 16, 2016 07:07 AM
69 Six Pack
Camaros for Sale
13
Oct 5, 2015 07:51 PM
Hawkeye1980
TPI
15
Aug 31, 2015 07:09 AM
355tpipickup
Alternative Port EFI Intakes
1
Aug 22, 2015 06:06 PM
NWAsonoma
TBI
4
Aug 18, 2015 05:45 PM




All times are GMT -5. The time now is 07:29 PM.