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Search: Posts Made By: JPrevost
Showing results 1 to 50 of 498
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Forum: DIY PROM
08-14-2021, 06:51 PM
Replies: 9
Views: 1,122
Posted By JPrevost

Re: G2X TBI-Type Switching Adapter...omg what is it?!?!

Parallel Memory works like this: To get information out of them you need to have the correct address lines set. If your working with 8-bit data then something like the 2732 eprom is named 32K (bits)...
Forum: TBI
05-06-2015, 12:25 PM
Replies: 7
Views: 4,364
Posted By JPrevost

Re: 91 camaro 305 tbi running rich

Misfire allows unburned oxygen to get to the oxygen sensor. ECM interprets this as not enough fuel, compensates and adds fuel globally producing a richer running engine than is commanded in the...
Forum: TBI
05-06-2015, 12:39 AM
Replies: 2
Views: 774
Posted By JPrevost

Re: Budget power, keep the TBI or something else?

Here's the problem... the injectors will not be flowing enough fuel to feed that engine at peak HP. Cost break down: 255lph fuel pump, adjustable pressure regulator, tuning software and hardware can...
Forum: TBI
05-06-2015, 12:30 AM
Replies: 7
Views: 4,364
Posted By JPrevost

Re: 91 camaro 305 tbi running rich

Does it run well on first startup or always running rough? Try resetting the ecm blm memory? Black smoke? Any smoke during deceleration? Spark plug wires old with issues causing misfire that shows up...
Forum: TBI
05-06-2015, 12:12 AM
Replies: 7
Views: 4,364
Posted By JPrevost

Re: 91 camaro 305 tbi running rich

Does your SES light work and if so, any codes? Stock TBI ecm is speed density and rather sensitive to sensor data. If I were to list a bunch of reasons why your engine is running the way it is with...
Forum: TBI
12-27-2009, 02:53 PM
Replies: 41
Views: 8,928
Posted By JPrevost

Re: Dual TBI Setup.... idea (maybe)

I posted this information up a long time ago with regards to TBI airflow... it is not the problem... but the fuel is. Any healthy engine will quickly run out of fuel as the injectors are already...
Forum: Suspension and Chassis
01-10-2009, 11:30 PM
Replies: 32
Views: 1,162
Posted By JPrevost

Re: Sway bar "vent" holes on hollow bars...

Back from the dead... but just re-read this old post and if they were vent holes for welding... why would there need to be 2 holes made? One would have sufficed if the tube is in fact hollow the...
Forum: DIY PROM
07-12-2008, 11:46 AM
Replies: 55
Views: 37,163
Posted By JPrevost

Re: vortec spark table

Depending on your ecm, that hesitation might be a bug. The 7747 and 8746 code has an AE fuel issue at specific RPM's. I tried everything until RBob went through it and told me about the code "error"....
Forum: Brakes
09-08-2007, 04:30 PM
Replies: 189
Views: 50,634
Posted By JPrevost

Re: hydraboost

I contacted them over a year ago and got very little help. I've had this project sitting in my basement for over 2 years now and can't push it up on my priority list. What I can do is take...
Forum: DIY PROM
08-27-2007, 11:46 PM
Replies: 6
Views: 1,225
Posted By JPrevost

Re: Will the PP2 program a socketed LT1 ECM?

Yes but you'll need an adapter from xtronics.
Forum: DIY PROM
08-25-2007, 11:36 PM
Replies: 113
Views: 11,198
Posted By JPrevost

Re: Grumpy has passed on

I just heard from a friend that follows these boards more often. I can't say I was surprised having known about his health issues for years but that doesn't change my grief.
Bruce was a difficult...
Forum: Memorial Board
08-25-2007, 11:36 PM
Replies: 113
Views: 13,154
Posted By JPrevost

Re: Grumpy has passed on

I just heard from a friend that follows these boards more often. I can't say I was surprised having known about his health issues for years but that doesn't change my grief.
Bruce was a difficult...
Forum: Fabrication
02-18-2007, 06:06 PM
Replies: 452
Views: 82,587
Posted By JPrevost

Comparatively this rational doesn't work in...

Comparatively this rational doesn't work in anybody's favor.
2 guys with identical cars remove the same amount of weight but one reports the weight as 2900lbs and the other reports 3100lbs... one...
Forum: DIY PROM
10-26-2006, 09:12 PM
Replies: 9
Views: 1,084
Posted By JPrevost

You are correct. Straight from the hack file; ...

You are correct.
Straight from the hack file;
LD263: FDB 65 ; max sync bpw to exit async fuel, 992usec
LD265: FDB 45 ; min sync bpw to enter async fuel, 687usec
LD267: FDB 26 ; injector bias,...
Forum: DIY PROM
10-19-2006, 06:59 PM
Replies: 4
Views: 1,266
Posted By JPrevost

Thanks. That should be plenty.

Thanks. That should be plenty.
Forum: DIY PROM
10-18-2006, 12:30 PM
Replies: 4
Views: 1,266
Posted By JPrevost

I will try playing with the tcc settings but I...

I will try playing with the tcc settings but I have a feeling the logic isn't the same. This is probably why there was a different ecm for the trucks with the TH400 and TBI. Gotta love it.
Forum: Fabrication
10-18-2006, 12:16 AM
Replies: 25
Views: 3,156
Posted By JPrevost

You might have added a lot of weight but where...

You might have added a lot of weight but where it's at has probably lowered your center of gravity :) .
Forum: Fabrication
10-18-2006, 12:12 AM
Replies: 6
Views: 1,862
Posted By JPrevost

Looks much better! Great job.

Looks much better! Great job.
Forum: Fabrication
10-18-2006, 12:09 AM
Replies: 10
Views: 832
Posted By JPrevost

Wheel spacers or adaptors out of aluminum. Turn...

Wheel spacers or adaptors out of aluminum. Turn brake rotors depending on your tooling and autofeed options. Bore a throttle body, single with a 3 or 4 jaw chuck, complex throttle bodies can be bored...
Forum: DIY PROM
10-17-2006, 11:58 PM
Replies: 4
Views: 1,266
Posted By JPrevost

EBL and TH400 downshifting?

1228747 ecm replaced (obviously) and downshifts from throttle position are no longer working. Is there a fix?
This is a 90' 454SS but there are a lot of models out there with this trans that won't...
Forum: DIY PROM
07-21-2006, 08:22 PM
Replies: 18
Views: 1,181
Posted By JPrevost

Wouldn't the voltage out for 960*C /2 be 4.91v...

Wouldn't the voltage out for 960*C /2 be 4.91v and not 4.65v? Or is there something going on that I don't understand about those resistors. :huh:
Are you sure you can fry an ECM A/D with a littler...
Forum: Fabrication
07-18-2006, 11:57 PM
Replies: 21
Views: 2,359
Posted By JPrevost

If that looks the way I think it does I'd say the...

If that looks the way I think it does I'd say the suspension isn't a suspension at all. With the ladder bar welded to the axle tube the axle is forced to rotate about on an arc with the center at the...
Forum: DIY PROM
07-15-2006, 07:24 PM
Replies: 18
Views: 1,181
Posted By JPrevost

Take another look at the attached image and see...

Take another look at the attached image and see if you can't figure it out. Next hint is the website pdf (http://simplecircuitboards.com/Spec%20Sheets/EG%20Thermocouple%20Board.pdf) file spec sheet....
Forum: TBI
07-15-2006, 02:46 PM
Replies: 2
Views: 1,400
Posted By JPrevost

My TBI adaptor plate...

So it's been a while. Sorry for not being able to contribute much of anything but I did want to share something that a friend made for me. It's nothing fancy dancy, just an adaptor plate that lets...
Forum: DIY PROM
07-15-2006, 02:20 PM
Replies: 18
Views: 1,181
Posted By JPrevost

Thermocouple Amplifier Boards...

Thermocouple Amplifier Boards (http://simplecircuitboards.com/Thermocouples.html)

I asked him to make me a simple board and he did... apparently (just checked his site) he added an upgrade to what...
Forum: Suspension and Chassis
06-01-2006, 12:30 PM
Replies: 34
Important/Useful : Front end-rebuild spreadsheet
Views: 47,661
Posted By JPrevost

According to Advance's website they do carry Moog...

According to Advance's website they do carry Moog parts for our cars. I got everything off of the websites. I'm going to stick with Moog for most of the parts and the cheapest idler arm that comes...
Forum: Exhaust
05-28-2006, 04:55 PM
Replies: 1
Views: 549
Posted By JPrevost

4th gen performance "stock" muffler?

A couple years ago I got given a muffler from a 4th gen owner who said it was stock. I want to say he said it was an SS camaro muffler but in any case I wanted to know if it would fit on a 3rd gen....
Forum: Exhaust
05-28-2006, 04:52 PM
Replies: 18
Views: 970
Posted By JPrevost

Well a lot of drag racers that need mufflers but...

Well a lot of drag racers that need mufflers but don't want to have a full exhaust will install the muffler as close to the engine as possible and then for the track just remove the rear exhaust.
It...
Forum: Exhaust
05-28-2006, 04:45 PM
Replies: 10
Views: 793
Posted By JPrevost

Stock mufflers are very quiet no matter what...

Stock mufflers are very quiet no matter what engine is upstream.
Borla is consider quiet from all platforms but if you're going true duals then you might look at going with a small 2.25"...
Forum: Exhaust
05-28-2006, 04:40 PM
Replies: 5
Views: 1,932
Posted By JPrevost

Changine anything with the exhaust changes the...

Changine anything with the exhaust changes the sound. Even adding different tips can change the sound because everything resonates differently. It's the same with stereo systems. Put a sub in a...
Forum: Aftermarket Vendor Review
05-28-2006, 04:12 PM
Replies: 22
Views: 3,545
Posted By JPrevost

I can see why they sell the shocks so cheap......

I can see why they sell the shocks so cheap... they don't know what to charge for an oil filter!!! $20 for an old pf25 oil filter. What are they thinking? They were $3 when still on the shelf.
I do...
Forum: Aftermarket Vendor Review
05-28-2006, 04:10 PM
Replies: 9
Views: 851
Posted By JPrevost

There is one problem with all of this... it was a...

There is one problem with all of this... it was a quote, not an estimate. If it was an estimate you have no ground to stand on but if it was a quote then before anything "happens" they need to notify...
Forum: Suspension and Chassis
05-27-2006, 05:34 PM
Replies: 34
Important/Useful : Front end-rebuild spreadsheet
Views: 47,661
Posted By JPrevost

Attachment

Attachment
Forum: Suspension and Chassis
05-27-2006, 05:30 PM
Replies: 34
Important/Useful : Front end-rebuild spreadsheet
Views: 47,661
Posted By JPrevost

Front end-rebuild spreadsheet

I've attached a pdf file that should help people decide where to get their parts.
I did this because I was convinced that there were only a few 'real' brands of parts for our cars. Look at the part...
Forum: DIY PROM
05-27-2006, 02:34 PM
Replies: 10
Views: 1,570
Posted By JPrevost

A friend's Imp 96ss with LT's and home-maid CAI...

A friend's Imp 96ss with LT's and home-maid CAI has gotten his best ET and mpg with 87. He was running 93 but I told him to look into running the cheap stuff and he said he could feel a difference....
Forum: Aftermarket Product Review
05-26-2006, 09:43 PM
Replies: 59
Views: 10,417
Posted By JPrevost

Back from the dead to remind everybody that PA =...

Back from the dead to remind everybody that PA = crap . :thanks:
Forum: Fabrication
05-26-2006, 09:21 PM
Replies: 452
Views: 82,587
Posted By JPrevost

If you have more time than money to spend on your...

If you have more time than money to spend on your car and you want to do the weight reduction I suggest you work with Excel or some similar program like that offered by Open Office.
With it, write...
Forum: Suspension and Chassis
05-26-2006, 08:36 PM
Replies: 23
Views: 4,106
Posted By JPrevost

All of his books are great. I wish I could have...

All of his books are great. I wish I could have met the man. Got the chance but he died a few days before my first FSAE competition. He was the main judge.

Back on subject; I don't think a camaro...
Forum: DIY PROM
05-26-2006, 07:19 PM
Replies: 10
Views: 1,570
Posted By JPrevost

You might have high quench chambers but remember...

You might have high quench chambers but remember that the pistons at TDC relative to the combustion chamber is what make it fast burn. Keeping the pistons "in the hole" and running a thick head...
Forum: Aftermarket Vendor Review
05-25-2006, 01:40 PM
Replies: 3
Views: 2,023
Posted By JPrevost

I've had my share of problems but my programmer...

I've had my share of problems but my programmer (original) has only needed too be repaired once when I hooked up the power polarity wrong. He uses what I consider a non-standard polarity where the...
Forum: DIY PROM
05-22-2006, 03:03 PM
Replies: 37
Views: 1,584
Posted By JPrevost

There isn't much air/fuel being burned during...

There isn't much air/fuel being burned during cruising so unless you've got a barn door strapped to the front of your car and are trying to keep 75mph I don't see any real need for looking at ALL...
Forum: DIY PROM
05-20-2006, 01:22 PM
Replies: 37
Views: 1,584
Posted By JPrevost

I'm glad you're getting results like I've been...

I'm glad you're getting results like I've been with running low timing and high AFR with low octane. Under light cruise the engine isn't moving much air so running those high AFR's shouldn't pose any...
Forum: Electronics
04-26-2006, 03:40 PM
Replies: 20
Views: 1,212
Posted By JPrevost

That could work real well for the fan and water...

That could work real well for the fan and water pumps. If somebody were to spend the time designing a circuit it might be worth looking into embedding the on/off logic. Tap into the CTS sensor,...
Forum: Electronics
04-09-2006, 12:13 AM
Replies: 4
Views: 444
Posted By JPrevost

I once drove from Princeton, NJ, to Detroit, MI...

I once drove from Princeton, NJ, to Detroit, MI and had the same problem. After an evening of pulling apart the wiring harness it ended up being a bad shifter. The backup lights get +12 and somehow...
Forum: Transmissions and Drivetrain
02-22-2006, 02:05 PM
Replies: 2
Views: 2,976
Posted By JPrevost

Depends on the rear gears and if you want to keep...

Depends on the rear gears and if you want to keep the lock-up feature.
My suggestions;
3.42-4.10 gears and lock-up = 2400 stall
3.42-4.10 gears no lock-up = 2000 stall
2.73-3.42 gears and lock-up...
Forum: Transmissions and Drivetrain
02-22-2006, 01:59 PM
Replies: 18
Views: 2,465
Posted By JPrevost

Not a true ratchet shifter. From the explination...

Not a true ratchet shifter. From the explination on their webpage they say, "you can bump the stick forward for each gear and not worry about overshifting." As in when you push forward, it won't...
Forum: TBI
02-02-2006, 02:28 PM
Replies: 144
Views: 16,054
Posted By JPrevost

The HSR is a GREAT intake. For all the...

The HSR is a GREAT intake. For all the complaining people do about the log style distribution they can't deny the very real power gains across 95% of everybody's usable powerband.
The other problem...
Forum: DIY PROM
02-02-2006, 12:16 PM
Replies: 12
Views: 1,019
Posted By JPrevost

I'm not doubting your gains but did you get a...

I'm not doubting your gains but did you get a good before and after measurment of the oil temps? If not, what was your mpg with a richer AFR?

The other thing I'd like to note as important is the...
Forum: TBI
02-01-2006, 12:10 AM
Replies: 1
Views: 625
Posted By JPrevost

Swirl ports the future?

FLUENT for Internal Combustion Engine Design (http://www.fluent.com/solutions/brochures/ic-minibrochure-final.pdf)
Check out page 6. I'll let everybody take a look and post their thoughts before I...
Forum: DIY PROM
01-31-2006, 02:11 PM
Replies: 12
Views: 1,019
Posted By JPrevost

I can't tell you how to get an approximate mpg...

I can't tell you how to get an approximate mpg but I can give you an idea of how to estimate for better or worse. Kind of like a narrowband o2 sensor, sure it's good at 14.7 but other than that it...
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