HSRTPI

Just finishing up with a 2 yr project on 89 C4. researching forums with the people who been there done that has paid off. Tuning is the issue.
There have been a few attempts at programming ecm over 6 weeks of mail order and $$$. Finally had to buy burn2 and copy bin files myself.
Still learning tables in Tunerpro. Just looking for help with basic tune. Was told that my cam was made for a carb. Also was told this cam is recommended
for my setup with hsr efi. Several corvetteforum pros said it requires a little extra effort. Does anyone know (ball park) how many attempts it usually takes if I also buy
data-logging equipment? Comp Cams took every detail from my build and sent a detailed recommended cam form back. We went back and forth for weeks to get it right.
My build started with what fuel and what elevation but maybe should have started with what can the ECM handle. frustrating....
Starts up and idles great. I can rev it full rpm range in neutral or park. Drives ok under 2500 rpm. Burns gas like crazy! The fumes run me out the shop.
working with this bin file attachment:

GeneralDisorder

iTrader: (1)

Switch to the EBL Flash II from Dynamic EFI. It has N-Alpha blending and can smooth out that camshaft. Also has many more features and lots of members here that know how to tune with it - including the developer of the system.

https://www.dynamicefi.com/EBL_Flash.php

GD

???

iTrader: (5)

I don't have one, but if you've got nothing to start with, ebl seems like a good place to start. there's not really a known number of times to make something run right. I've flashed over a bin 20 times in one morning just getting idle right. it only takes a sec to do. the time comes in from the learning curve that all tuning has. why most just drop the car off at a dyno tuner after it's built as say call me when it runs. for the basics thou, you really gotta have a wideband and be able to data log. incase you don't have that.

but on a side note, if you say it starts and idles well now with zero tuning on a stock chip. that's the hard part with big cams. the wot fueling isn't as hard to learn compared. kinda sounds like you need some basic clean up on the tune to me.

but again, I think you'd be very happy with ebl. I'm close to picking on up just to check out, even though I have the chip stuff already. and I'd think any decent tuner with a dyno could tune with ebl pretty quickly if you find one willing to try if you don't have great luck at it.

GeneralDisorder

iTrader: (1)

If you're in the Portland, OR area or surrounding, I have a 2000 HP chassis dyno......

GD

Orr89RocZ

iTrader: (20)

You can get it to work. How many chip burns? Depends how good you are at it and what you are willing to live with for results

first thing you need is a wideband o2 sensor like an aem uego kit. Know what the fuel is doin to adjust fueling.

I would disable closed loop as first pass and tune open til its good. Cruise areas 14.5-15.5 ish give or take. Idle check your plugs and vacuum since the cam overlap can somewhat mask o2 readings with fresh air getting thru. Plug color will tell the burn

wot use the pe mode enrichment vs rpm

HSRTPI

thanks, disable closed loop is to raise coolant temp on engage table?

HSRTPI

tried to download smaller pic but didn't work this one is way too large

Orr89RocZ

iTrader: (20)

Yeah raise coolant temp on the enable scalar

also on the power enrichment spark adder table, might wanna zero that out at 3200 and 4800. Thats alot of timing. At 4000-4800 in main table i would make that 34-36 for now at lv8 of 180+

If you are on stock 113 heads it may want 36-38 in the end but i would start lower and work up

84Elky

You say it drives OK under 2500 RPM. What happens after 2500. With that cam, would expect just the opposite = minimal lower RPM torque with higher RPM horsepower.
Will your cam work with TPI? Yes, but with a lot of side effects. IMO, this is not a street cam for TPI or carb, unless your at 2000-2500+ RPM all the time. TPI idle will be horrible (fumes) unless done in Open Loop, and then no picnic due to low vacuum. For TPI, your LSA of 110=OK, ICL of 106=OK, but your I/E open/close valve timing produces an overlap of 71 degrees which is very high for the street. Probably has a mean sounding idle if you can stand the fumes. You also did not state your compression ratio, which would need to be higher than the stock '89 L98 with 113 AL heads of 9.5:1.

Here's what UDHarold has to say about camming an engine (he developed the very popular Voodoo line of cams for Lunati):

HSRTPI

thanks 84Elky,
383 stroker build with 11.15 to 1 cr Holley Stealth Ram, 64cc 210 aluminum heads with 1.6 rr. 100lb fuel pump with reg set at 48lbs
42lb injectors (4hole design) 3000 stall tc with transgo shift kit, champion 3row w/dual fans.
I can only use 1/10 gas pedal to drive, will run up to 80mph as long as the rpm stays below 3000rpm.
engine just shuts off if i push pedal down more than 1/4"
starts and idles just fine I can rev engine up to 4000rpm in the shop but not while driving.
here is bin file i'm currently running

Orr89RocZ

iTrader: (20)

I’ll take a look but a wideband would quickly tell whats up

if its like my 383 hsr it will need a ton more pe mode enrichment vs rpm

???

iTrader: (5)

that's a heck of a combo.

I would say don't even drive this till you get a wide band hooked up and the data in the logs.

HSRTPI

Ordering wideband kit. Trying to find a good spot to mount bung without dropping the headers or exhaust system. Any ideas ?

HSRTPI

sounds like good advice, just sounds so damn good i had to give it a try.
no more driving till wideband and datalogging gets here. i will update progress, thanks again

ULTM8Z

So what I'm seeing in your bin file...

Your injector size is set to 22 lb in your bin. If you're running 42 lb injectors with pressure set to 48 psi, that's probably the root of your problem. You need to set this value to 42 and then lower your fuel pressure to 40 psi with vacuum disonnected.

My guess is you're also running the factory injector voltage offsets and you probably have Bosch-III injectors. If you can post the p/n of your injectors, we can probably find the right offsets. You'll then want to put those values in.

84Elky

Must make sure mounting instructions are followed to ensure tip of sensor is facing slightly down (10 deg+). Unfortunately, that may require dropping or removing header because with 'vette, probably not a lot of room under there.. WBo2 certainly necessary, but impossible to analyze problem with only the bin. Need logs.

HSRTPI

Found the original order form for the Bosch 42lb injectors.

Part Number: 0280150558 / 0280155968

HSRTPI

Connector type: EV1 Type: Fuel Injectors
Gain: 0.12ms/MG Manufacturer Part Number: 0280150558
Item Quantity: 8x fuel injectors Interchange Part Number: 0280150558 0280155968
Orifice Type: 4 hole Warranty: 1 Year
Spray Pattern: 15 Degree Spray Cone Fitment Type: Direct Replacement
Coil Resistance: 12 Ohms / High Impedance Number of Pieces: 8
Static Flow Rate: 42 lb/hr = 440 cc/min @ 43.5PSI ( 300kPa ) Length: 3" (74mm)
Filter Design: Basket filter design at inlet UPC: 610877356249
Pressure: Min 30PSIG/ Max 100PSIG EAN: Does not apply
Injector Design: Metal & composite plastic Design: Bosch GEN III EV1 Style Fuel Injector
O-Rings Included:Yes, preinstalled Surface Finish: Brand new
Offset: 0.055ms Amperage: 1.0 Amps

ULTM8Z

https://www.thirdgen.org/forums/diy-...iii-42-lb.html

Here are the offset values...

???

iTrader: (5)

wrong thread

HSRTPI

Tunerpro rt seems to have named the parameters differently than what i have read up on settings. Is there another tuner software that will
have these settings easier to find.
42 lb/hr. @ 39.15 psi
Minimum Pulse Width: 1.13 ms
Injector Offset:
V - ms
6 - 4.986
8 - 2.098
10 - 1.321
11 - 1.095
12 - .919
13 - .786
14 - .670
15 - .575

Orr89RocZ

iTrader: (20)

Only offset table i know is the battery voltage/injector pulsewidth offset table. I think you have it open on your lower left in the pic above. But keep eye on units. Some tables use msec some use usec. Think thats 1000 multiplier diff lol

Tuned Performance

iTrader: (92)

You might want to incorporate your wb signal to the ecm and use arapwb.bin
https://www.thirdgen.org/forums/diy-...deband-o2.html

anesthes

iTrader: (12)

I'm fairly certain the EBL will communicate with his dash so he wouldn't lose the enhanced functionality (economy, range, etc) which would be nice. I think the $6E stuff sucks, I'd lose it with the quickness and go with a speed density system.

Although to be fair, Pat (Tequila boy), Greg Carrol, and others have done some impressive mods to $32B using Ford MAF's so that is an option too..

-- Joe