New to tuning, what to change for bigger bore and cam?
01-22-2016, 10:58 AM
#1
Member
Thread Starter
New to tuning, what to change for bigger bore and cam?
I have a .020 over 3.4L block currently in the shop getting the block checked and the internals balanced. When it comes back I will be putting this block into my '91 in place of the stock 3.1L block. I will also be getting a 272/284 grind cam most likely from Delta. Cam specs are:
Basic Operating RPM Range: 2,000-5,000
Intake Duration at 050 inch Lift: 216
Exhaust Duration at 050 inch Lift: 228
Duration at 050 inch Lift: 216 int./228 exh.
Advertised Intake Duration: 272
Advertised Exhaust Duration: 284
Advertised Duration: 272 int./284 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.454 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.480 exh.
Lobe Separation (degrees): 112
I was wondering what all I need to change to make this run right. Also there is a member on the classifieds board selling a package tuning deal. Is it worth the purchase for this tune and later a hybrid top end tune? Here is his package:
"Tuning and turbo ECM and RePin stuff
Includes all of the following:
1 x S3 Aries 32-Pin ZIP Socket
1 x EX 6-Foot Rotary DIP Extension w/LED
1 x G3 Bank Switching Adapter
1 x APU1 AutoProm USB
1 x HDR1 Memcal Header
1 x '730 ECM
1 x '730 ECM Memcal w/EEPROM
1 x USB Cable
1 x Set of ECM Sockets for Re-Pinning
1 x 2-Bar MAP Sensor w/pigtail
1 x ALXY PROM
1 x ATSX PROM
1 x ABWW PROM
1 x Hypertech Custom Chip for 89 350 TPI(Part # 128922)
The 730 ECM Memcal w/EEPROM has a tune on it from another member who had a remote mount setup. This setup was stock pushing 5 psi and he put down 327hp and 450ft-lb through a 6 speed.
He did this by repinning this 730 to a 749.
His quote to me
"If you pin everything correctly, and you swap out to 30lb SVO injectors, the ECM I would send you should be able to start and run your car. You will have to adjust it for your car. I have a t56 6-speed in mine too, so you will need to change the speed sensor section too. It is also setup for a Narrow Band O2, so you can run the ECM off of the narrow band output from the wide band sensor for now. I think there is a hack for wide band in the '749 code""
Basic Operating RPM Range: 2,000-5,000
Intake Duration at 050 inch Lift: 216
Exhaust Duration at 050 inch Lift: 228
Duration at 050 inch Lift: 216 int./228 exh.
Advertised Intake Duration: 272
Advertised Exhaust Duration: 284
Advertised Duration: 272 int./284 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.454 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.480 in.
Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.480 exh.
Lobe Separation (degrees): 112
I was wondering what all I need to change to make this run right. Also there is a member on the classifieds board selling a package tuning deal. Is it worth the purchase for this tune and later a hybrid top end tune? Here is his package:
"Tuning and turbo ECM and RePin stuff
Includes all of the following:
1 x S3 Aries 32-Pin ZIP Socket
1 x EX 6-Foot Rotary DIP Extension w/LED
1 x G3 Bank Switching Adapter
1 x APU1 AutoProm USB
1 x HDR1 Memcal Header
1 x '730 ECM
1 x '730 ECM Memcal w/EEPROM
1 x USB Cable
1 x Set of ECM Sockets for Re-Pinning
1 x 2-Bar MAP Sensor w/pigtail
1 x ALXY PROM
1 x ATSX PROM
1 x ABWW PROM
1 x Hypertech Custom Chip for 89 350 TPI(Part # 128922)
The 730 ECM Memcal w/EEPROM has a tune on it from another member who had a remote mount setup. This setup was stock pushing 5 psi and he put down 327hp and 450ft-lb through a 6 speed.
He did this by repinning this 730 to a 749.
His quote to me
"If you pin everything correctly, and you swap out to 30lb SVO injectors, the ECM I would send you should be able to start and run your car. You will have to adjust it for your car. I have a t56 6-speed in mine too, so you will need to change the speed sensor section too. It is also setup for a Narrow Band O2, so you can run the ECM off of the narrow band output from the wide band sensor for now. I think there is a hack for wide band in the '749 code""
01-22-2016, 01:30 PM
#2
Re: New to tuning, what to change for bigger bore and cam?
At a minimum you'd have to adjust the constants for the displacement of the engine and the 30lb injectors.
After that you'll be playing around with the VE tables to get the fuel trim dialed back in. That's all done off the narrow band and a data logger, looking at the integrator and BLM (short term and long term trim, respectively)
After that, you'll get into the Power Enrichment WOT stuff. That's where the wide band comes in. But you'll want to ease into the throttle to ensure you're not going too lean before seriously punching WOT.
You may need to tweak the Accelerator Enrichment values (pump shot in carburetor-speak) if you feel stumbling on throttle transitions.
The cold start open loop may also need some tweaking for good start up manners.
Those would be the basics.
After that you'll be playing around with the VE tables to get the fuel trim dialed back in. That's all done off the narrow band and a data logger, looking at the integrator and BLM (short term and long term trim, respectively)
After that, you'll get into the Power Enrichment WOT stuff. That's where the wide band comes in. But you'll want to ease into the throttle to ensure you're not going too lean before seriously punching WOT.
You may need to tweak the Accelerator Enrichment values (pump shot in carburetor-speak) if you feel stumbling on throttle transitions.
The cold start open loop may also need some tweaking for good start up manners.
Those would be the basics.
02-26-2016, 11:43 AM
#3
Member
Thread Starter
Re: New to tuning, what to change for bigger bore and cam?
OK thank you. Where do you change the displacement constants? I am using tunerpro rt and I do not see an area to change that. I have been looking online, but most posts only point you to diy-efi.org which is no more. I have found some info using the wayback machine, but even then it doesn't match.
Like accourding to the archived page of efi-diy there is a location in the hex where you change displacement and injector flow rate. Only problem is that tunerpro shows that location in the hex as being empty.
Like accourding to the archived page of efi-diy there is a location in the hex where you change displacement and injector flow rate. Only problem is that tunerpro shows that location in the hex as being empty.
02-26-2016, 04:15 PM
#5
Member
Thread Starter
Re: New to tuning, what to change for bigger bore and cam?
What do you mean by an EBL system?
I was comparing my bin I took off the stock chip vs the atzy bin I downloaded. Why do the two have codes in different places?
I was comparing my bin I took off the stock chip vs the atzy bin I downloaded. Why do the two have codes in different places?
02-26-2016, 04:27 PM
#6
Re: New to tuning, what to change for bigger bore and cam?
If you pulled the trigger on the tuning equipment already then disregard what I was saying, but if not, look into the EBL system to tune. You'll be up and running in minutes, regardless what cam, injectors, turbo, etc. your running. Burning chips is so outdated, but I digress...
DynamicEFI.com
DynamicEFI.com
02-26-2016, 04:33 PM
#7
Member
Thread Starter
Re: New to tuning, what to change for bigger bore and cam?
Ok. Ya I have everything but the aldl cabana that's on the way already
Trending Topics
02-28-2016, 05:10 PM
#8
Re: New to tuning, what to change for bigger bore and cam?
At a minimum you'd have to adjust the constants for the displacement of the engine and the 30lb injectors.
After that you'll be playing around with the VE tables to get the fuel trim dialed back in. That's all done off the narrow band and a data logger, looking at the integrator and BLM (short term and long term trim, respectively)
After that, you'll get into the Power Enrichment WOT stuff. That's where the wide band comes in. But you'll want to ease into the throttle to ensure you're not going too lean before seriously punching WOT.
You may need to tweak the Accelerator Enrichment values (pump shot in carburetor-speak) if you feel stumbling on throttle transitions.
The cold start open loop may also need some tweaking for good start up manners.
Those would be the basics.
After that you'll be playing around with the VE tables to get the fuel trim dialed back in. That's all done off the narrow band and a data logger, looking at the integrator and BLM (short term and long term trim, respectively)
After that, you'll get into the Power Enrichment WOT stuff. That's where the wide band comes in. But you'll want to ease into the throttle to ensure you're not going too lean before seriously punching WOT.
You may need to tweak the Accelerator Enrichment values (pump shot in carburetor-speak) if you feel stumbling on throttle transitions.
The cold start open loop may also need some tweaking for good start up manners.
Those would be the basics.
thanks you so much!!!
can you give a link to a simplistic, spoon feeding article on how to tweak the ve tables based on the results of the datalog with a narrow band?
03-01-2016, 08:33 AM
#9
Member
Thread Starter
Re: New to tuning, what to change for bigger bore and cam?
Thank you ULTM8Z.
I actually fired it up on a level 1 tune of mine this weekend and I must say the convertible really likes having the right information. All I did was bump up the timing one degree fix the injector size and remove the egr and air pump. It now starts and idles better than it ever has. Sounds strong running up through the RPM's in park too
I actually fired it up on a level 1 tune of mine this weekend and I must say the convertible really likes having the right information. All I did was bump up the timing one degree fix the injector size and remove the egr and air pump. It now starts and idles better than it ever has. Sounds strong running up through the RPM's in park too
Thread
Thread Starter
Forum
Replies
Last Post