Search



Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Sponsored by Weld Racing


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 06-06-2010, 08:01 PM   #1
Jayson95GT
1st Gear Member
 
Jayson95GT's Avatar
 
Join Date: Jan 2005
Vehicle: 95 Mustang GT
Location: Indiana
Posts: 104
Default 347 stroker tuning questions

Hey guys, I've got a 95 gt I have recently started tinkering with again(couldn't afford it there for a while).

Here are my Mods:
347 stroker kit, AFR Heads, Trickflow track heat intake, 36lb injectors + fuel rail + Adjustable FPR and hi flow fuel pump, some other little goodies and a Comp Cams Extreme EFI stroker cam. Specs of cam are: Gross Valve lift .579 for both intake and exhaust. Duration @ .006 tappet lift is 286intake and 300 exhaust. Basically its a pretty healthy cam, they recommend no less than a 3000 stall converter on it.

My questions are this, #1 My car cant seem to figure out what speed to idle at, which i know is kinda normal with that healthy of a cam but sometimes it will actually die on me lol. It seems to be fine after it idles for a few seconds but then if you give it a little gas then let it return back to idle sometimes rpms will drop to low and it will die again. I think it may be running a little to rich too, I bought a MAF from brenspeed for it to compensate for the bigger injectors but the guy kept saying 30lb injectors and i kept correcting him that they were 36lb. He didn't seem to care though. Not sure if that makes that big of a deal or not. I thought Maybe a dyno tune would fix my idling issue but not sure. Any suggestions?

Question #2: Whats the best way to adjust timing on a "Race Motor" like this? Should I just unplug the spout connector and adjust it to like 12 degrees or so with it idling like a stock motor? I have heard of people adjusting timing on a race motor with it running at like 3000 rpms and setting it at max timing advance. Is this done with the spout connector plugged in? Also what would max advance be? Should i even bother with this?

All help is appreciated, if you need to know my mods in deeper detail just let me know.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
Jayson95GT is offline   Reply With Quote
Old 06-06-2010, 09:41 PM   #2
AdderMk2
Banned
 
Join Date: Dec 2005
Vehicle: 94 Cobra
Location: Lil' Rhody
Posts: 22,376
Send a message via AIM to AdderMk2
Default

its likely that they sent you an incorrect maf. I'd definitly check into that.

you NEED a dyno tune... end of story

and get a new intake manifold (sorry) but the one you have is going to choke out the top end on your motor (ask me how I know)
AdderMk2 is offline   Reply With Quote
Old 06-07-2010, 11:58 AM   #3
Venomantidote95
4th Gear Member

 
Venomantidote95's Avatar
 
Join Date: Jul 2008
Vehicle: 95 GT
Location: alabama
Posts: 1,785
Default

I have a friend with a 331 with the same xfi cam .579/.579 lift we put it together an got it running had small idling problems til we got the fuel right had 30lbs injectors with a stock meter until his calibrated meter came in ran fine just had to drop the fuel pressure to 32lbs, when he got the calibrated meter we went back to 40lbs. set tps voltage tp .998 idle. depending on the heads you have 165 185 etc the intake is ok, bigger than 185 u`d need to step it up! he has the vic jr heads and we opted for the r-series intake with your same camshaft.

your question about the timing: when you advance to say 35* like the (race engines) you mentioned you leave the spout out and thats that, 35 at idle 35 at wot! you dont want to ride the car that way the mpg will blow *****. and can be hard to start! not reccomended on efi!

the idle on your car can be corrected by the iac adj screw and the actual throttle screw! it takes time and is a headache but can be done!

the end result is you go to get a tune anyway or get and aftermarket engine management!

then you have to understand VE table and afr, and timing curves!
__________________
Hot 302, pop-up pistons, 3/4 race cam, 4 prong race plugs and some go juice lmao! Sig inspired by true ignorant *** people!
Venomantidote95 is offline   Reply With Quote
Old 06-07-2010, 01:29 PM   #4
ctgreddy
6th Gear Member
 
Join Date: May 2007
Vehicle: '95 gt 347
Location: Westland, MI
Posts: 6,187
Default

i have a mail order tune on my 347 and it runs perfect. only issue with my car is i had to up the fuel pressure to get the wot afr's dead on. no big deal imo it's been running great and beating on a lot of local guys. actually i got a dyno tune from livernois, which is a very reputable shop in michigan, and with my mail order it runs and idles way better. if you'd like more info on the tune pm me and i'll give you the guys info.

on the second issue, just pull your spout and adjust timing at idle like normal. 12* sounds right to me.
__________________


'03 cobra- 2.8 KB mammoth, 19lbs, bolt ons, rxt clutch, sra w/ 3.73's

654/546 whp/tq

Old setup - Ported eaton, 16lbs, minor bolt ons, sra, self tuned.

501/501 - 11.23@124
ctgreddy is offline   Reply With Quote
Old 06-07-2010, 04:47 PM   #5
Jayson95GT
1st Gear Member
 
Jayson95GT's Avatar
 
Join Date: Jan 2005
Vehicle: 95 Mustang GT
Location: Indiana
Posts: 104
Default

ctgreddy i sent you a pm, i would love some more info on the mail order tune. Wow I thought that intake would be sufficient.... What intake would you guys suggest?
Jayson95GT is offline   Reply With Quote
Old 11-25-2013, 10:03 AM   #6
Nate69
 
Join Date: Nov 2013
Vehicle: 1993 ford mustang
Location: Iowa
Posts: 2
Default

heck yea ctgreddy would like to get some info from you as well , heck even if i have to trailer my car up there after im done with engine ...
Nate69 is offline   Reply With Quote
Old 12-01-2013, 04:51 AM   #7
barnett468
3rd Gear Member
 
Join Date: Nov 2013
Vehicle: 1965 shelby
Location: arizona
Posts: 579
Default

yes a dyno tine is best but if you don't do that the best "guess" for your set up is 12 - 14 idle timing and 34 total at around 2700 rpm.

if your engine turns over mpre slowly when hot then retard the idle timing 3 degrees but keep the max timing of 34.
barnett468 is offline   Reply With Quote
Old 12-01-2013, 04:51 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
1994, 347, afrs, average, cam, carb, dyno, mail, mpg, mustang, order, specs, stroker, tune, tuning

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 09:18 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup