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Forum: C4 Tech/Performance 05-29-2003, 02:01 AM
Replies: 61
Views: 3,393
Posted By AquaMetallic94LT1
Re: DYno Results for 406.....Coupled with MAF test. (ski_dwn_it)

The MAF works in open and closed loop mode. The addition of the O2 sensor put the ecm in closed loop mode and is used by the ECM to fine tune the fuel mixture because MAF is not accurate enough to...
Forum: C4 Tech/Performance 05-23-2003, 02:21 AM
Replies: 17
Views: 779
Posted By AquaMetallic94LT1
Re: Engine runs rich in open loop - can I adjust this ? (Stingraynut)

Do a manual fuel economy calculation and compare it to the computers calculation for the next few fill ups. The ECM uses the O2 sensor to compute exact injector flowrate and uses injector on times to...
Forum: C4 Tech/Performance 05-23-2003, 01:10 AM
Replies: 61
Views: 3,393
Posted By AquaMetallic94LT1
Re: DYno Results for 406.....Coupled with MAF test. (ski_dwn_it)

Awesome numbers dude !

Injector sizing by the common formulas is conservative to keep the engine from going lean if injectors clog or fuel pressure drops. Its worth noting that most if not all...
Forum: C4 Tech/Performance 05-23-2003, 12:52 AM
Replies: 4
Views: 374
Posted By AquaMetallic94LT1
Re: Corsa without mufflers........... (Steve'95)

The exhaust scrapped on the edge of a road that was under construction that I was crossing. I was busy with my new business so I put off fixing it and it fell off a few days later.

The muffler...
Forum: C4 Tech/Performance 05-22-2003, 03:09 AM
Replies: 6
Views: 281
Posted By AquaMetallic94LT1
Re: LT1 guys, need advice on heads (rocketfinger)

You have several options for cylinder heads. You can send you stock LT1 heads to a head porter who knows how to port them correctly with good results. You can also go with AFR LT1 190 cc or 180 cc...
Forum: C4 Tech/Performance 05-22-2003, 02:44 AM
Replies: 4
Views: 374
Posted By AquaMetallic94LT1
Corsa without mufflers...........

I recently lost one of my Corsa mufflers and I have been trying to decide what to do instead of replacing it with another 380 dollar Corsa muffler. The car actually sounded better above 3000 rpm...
Forum: C4 Tech/Performance 05-01-2003, 03:20 AM
Replies: 7
Views: 354
Posted By AquaMetallic94LT1
Re: At What Point Will One Need Reprogramming? (HOWSER)

The headers and no cats setup will allow the engine to breath a little better in the upper rpm ranges which will lean out the actual fuel air mixture. The aftermarket modified chips usually lean out...
Forum: C4 Tech/Performance 05-01-2003, 03:11 AM
Replies: 11
Views: 613
Posted By AquaMetallic94LT1
Re: has anyone ever wraped there long tube headers before? (Kehrer923)

You could try wraping the pipes a few inches down from the 1st bend after the exhaust ports. The steel in the headers (stainless or regular) will deteriorate from the high heat and the heat absorbed...
Forum: C4 Tech/Performance 05-01-2003, 03:04 AM
Replies: 5
Views: 346
Posted By AquaMetallic94LT1
Re: Opinions on Richmond gears (Glasman66)

If your thinking of D44, I think Richmond 4.10s are strip type gears which make more noise than stock by design - stronger design makes more noise. Toms Differentials has a nice set that is as quiet...
Forum: C4 Tech/Performance 04-23-2003, 03:07 AM
Replies: 11
Views: 904
Posted By AquaMetallic94LT1
Re: Steering morning sickness? (The13Bats)

I did my engine a few years ago and drained out the PS fluid and found a bunch of stuff in the fluid. I put in new fluid and had to drain the system again after two days and found more debris in the...
Forum: C4 Tech/Performance 04-23-2003, 03:02 AM
Replies: 13
Views: 1,864
Posted By AquaMetallic94LT1
Re: [L98] Have a look at my main bearings. Comments? (89 Paul in Cal)

You might have had a detonation problem, bad harmonic balancer (but the front bearing would be chewed up by that one) or balance problem. It looks like there was enough pressure on the rotating assy...
Forum: C4 Tech/Performance 03-12-2003, 11:50 PM
Replies: 1
Views: 315
Posted By AquaMetallic94LT1
Playing IM 240 Emissions test roulett

I finally finished the cam swap in my 383 stroker last weekend and took the car in for emissions testing on Monday. First attempt netted:

CO 16 g/mi NOx 2.39 g/mi THC 1.29 g/mi FAILED THC...
Forum: C4 Tech/Performance 03-04-2003, 02:33 AM
Replies: 16
Views: 375
Posted By AquaMetallic94LT1
Re: 8.5mm wirelooms for LT1 (fiddleplayer)

Wrestled with this for quite a while.

I used the MadeForYou verticle mounts on mine and mounted them horizontally to the holes where the stock looms bolted up to. I have two per side and had to...
Forum: C4 Tech/Performance 02-24-2003, 02:21 AM
Replies: 4
Views: 662
Posted By AquaMetallic94LT1
Re: LT-4 With Hot Cam using LT1 edit. How much can you advance the timing? (meyre1)

Small block chevy typically runs with 34 to 38 degrees total at WOT. The numbers in the table assume taht the opti timing is correct with no initial advance. You should see values of in the range...
Forum: C4 Tech/Performance 12-01-2002, 05:20 PM
Replies: 11
Views: 641
Posted By AquaMetallic94LT1
Re: Ran out of gas... now problems (ecrone)

It sounds like your charging system has problems. It could be a bad connection at the battery, loose ground connection, and or failing alternator.

The clunking might be from flywheel if you...
Forum: C4 Tech/Performance 11-21-2002, 03:42 AM
Replies: 15
Views: 587
Posted By AquaMetallic94LT1
Re: Could this have killed my opti? (John Row)

Yup, been there, done that. The face of the cap will come down on the rotor and grind it to bits. A new $200 cap and rotor will fix it.

The stock vent harness for the vented opti has a special...
Forum: C4 Tech/Performance 11-21-2002, 03:25 AM
Replies: 7
Views: 461
Posted By AquaMetallic94LT1
Re: Detailed LT1 specs? (GDP)

I have used DD2000 for LT1 simulations. Induction flow isn't that critical as long as its not too small. Use 780 cfm for throttle body.

Head CFM flow is done at a specific value of inches of...
Forum: C4 Tech/Performance 11-21-2002, 03:10 AM
Replies: 27
Views: 1,330
Posted By AquaMetallic94LT1
Re: I'm SCREWED!!! Can you identify anything here? (sspackman)

Here is my suggestion:

Step 1: Buy factory service manual.

Step 2: Find someone who has put small block chevy motor back togther.

GM mixed SAE and Metric hardware on the vette engine...
Forum: C4 Tech/Performance 11-21-2002, 03:00 AM
Replies: 9
Views: 631
Posted By AquaMetallic94LT1
Re: Climate control problems....need final word on this.... (95wht6spd)

This sure sounds like flaky power connection to the controller chip. Mine will go to auto if the battery has been disconnected. Check the connections to the controller unit that you use to control...
Forum: C4 Tech/Performance 11-21-2002, 02:39 AM
Replies: 34
Views: 2,304
Posted By AquaMetallic94LT1
Re: AFR Hydraulic Roller Rev Kits -- anyone using these? (85_togo)

Keep in mind that you should not run more spring pressure than is needed to prevent valve float at just above max engine rpm. Excessive spring pressure wears the valve train more, takes hp, and...
Forum: C4 Tech/Performance 11-21-2002, 02:27 AM
Replies: 11
Views: 1,001
Posted By AquaMetallic94LT1
Re: Arao 4 valve heads (candyapplevette)

The plus side on these heads is that the flow numbers look really impressive.

The problem I see with these heads is that they use the stock cam to drive the valves. They also don't appear to have...
Forum: C4 Tech/Performance 11-21-2002, 02:10 AM
Replies: 3
Views: 250
Posted By AquaMetallic94LT1
Re: LT-1 Cold #1 & #8 cyl?? (SteveElliott)

#1 and #8 are next to each other in the firing sequence. Opti problem maybe ?

Hows the motor idling and running at part throttle ?

What happened right before this problem started ?
Forum: C4 Tech/Performance 11-20-2002, 12:26 AM
Replies: 3
Views: 516
Posted By AquaMetallic94LT1
Re: Problems with Tunercat....need help (Torquem)

I used tuner cat to set my speedo with bad results. The speedometer would only read zero MPH. I had to go in and guess the value needed.

Try taking the stock programming and change the...
Forum: C4 Tech/Performance 11-20-2002, 12:13 AM
Replies: 59
Views: 15,939
Posted By AquaMetallic94LT1
Re: L98 vs LT1 (wmrobert)

Here is my .02:

L98 Good -

Same Gen I type of block (not same block) as 400 sb chevy so 420 ci small block is possible.
Lots more parts.

L98 bad -

Intake
Forum: C4 Tech/Performance 11-19-2002, 06:31 PM
Replies: 8
Views: 408
Posted By AquaMetallic94LT1
Re: Cam Specs - is this good? (steveelsbury)

The motor setup looks good. I suspect the AFR 220 heads are a bit overkill. The intake duration on the cam looks fine. I would think the engine builder would have spec'd a wider lobe spacing 112...
Showing results 1 to 25 of 498

 
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