Late night brainstorm

[Chvywolf]

It's 1 am and I'm brainstorming. :D

What is the biggest V6 the 7730 ECM has handled on a stock platform? Can it be used on a force fed 4.3lt V6 with proper prom tuning? Thoughts on this.

And I am being serious, just for the record. I have recently become aware that the 305 may not be lasting as long as I had hoped and want a new direction. As far as I know, a charged (super or turbo) 4.3lt V6 hasn't been seen in a thirdgen yet.

[Skweezn87]

Steve

Just run the 749 which is basically the same ECM and you can run a 2bar MAP sensor... ;)

Edit: Forgot to say.. SOUNDS like a GREAT lil project...

[ June 18, 2002, 07:43: Message edited by: Skweezn87 ]

[RacerX]

Steve if you do this let me know Ill be happy to help you.

[WS6 VERT]

Like Rick said, the 1227730 ECM is limited due to its MAP sensor. All the cars this ECM was installed in used regular MAP sensors, so the computer can only compute vacuum, not pressure.

If your really wanted to play w/ boosted applications, you need a 2 or 3 BAR MAP sensor and an ECM capable of understanding it (get one for a Scyclone/Typhoon I think).

[GMC-YA]

Steve, I like your idea, but I have to admit a GN transplant would be a much better idea. First off the is allready a turbo charged v6 in that platform, which means getting parts such has exhaust, intercoolers, etc would be much easier/cheaper, as in no custom fabbing. Now if the custom fabbing hasnt scared you off here is some helpfull info. Here is a programer for the syty 749 ecm. http://www.sytyauthority.net/prom.html Probably the easiest way your gonna force induct a 4.3 is pick up some used syty parts, http://www.syty.net/phpBB2/viewtopic.php?t=14962&highlight= http://www.syty.net/phpBB2/viewtopic.php?t=14919&highlight= http://www.syty.org/ look under the classifieds. I can try to answer any other questions you have, or help you find parts that would help you out.

[Chvywolf]

Thanks for the input guys. Nothing firm yet, but I want to try something different. I'll keep you all posted. Who knows, I may just give it a shot.

[ragtop88]

Originally posted by GMC-YA:
First off the is allready a turbo charged v6 in that platform, which means getting parts such has exhaust, intercoolers, etc would be much easier/cheaper, as in no custom fabbing....Really?? wow, would you mind telling me where to find all these spare parts for these cars??.. :D It seems that GM made exactly 1555 of everything for these cars and stopped production the day the last one drove off the assembly line.....sorry for the sarcasm, just messing with ya. Why not just turbo the 305?? Theres that dude turning 9's on the a turbo 305 thirdgen? Either way i think it would be cool.....i had thought about making a tuned port style intake for the 4.3 when I was rebuilding the engine in the wifes old blazer.

[Chvywolf]

Why not just turbo the 305 In a nut shell, I don't think it would handle another run down the 1/4 with a 50 shot let alone 8 psi. That and I wanna beat Bernard with a V6 so I can rub it in that much more. :D j/k

[ragtop88]

Well i didn't mean to just throw boost at it....i was figuring that if you wre going to rebuild something anyways, you have the 305 already there.....personally i'd like to do a 302 1-piece rear main seal block and throw lots of boost at it....... smile.gif

[Chvywolf]

Well one of the main reasons for thinking if this buildup was cost. The 4.3 shares a lot with the V8 SB. All my accessorys would transfer over. I know some fabrication is in order but thats to be expected anyway. Plus I chose the 4.3 for a few other reasons,

1) Shares same bore x stroke with 350 so parts (minus crank and cam) are availble for things like overbore, valves, springs etc..

2) Size. As Sculte found with his twin turbo V8, not a lot of room under our hoods for a set of turbo's. The compact size of the engine in the bay would allow for more breathing room to route things like exhuast tubes.

3) Cost. I like things that are different than anyone else (look at the rims) I've seen a lot of cases both in real life and on paper were a smaller inducted engine can make just as much power as a N/A bigger one and still get better fuel economy. Plus, i've seen 4.3 long blocks go as cheap as 50$ while spending a good part of the day looking for a 350 short block in salvageable condition.

4)Down time. I like driving my car and it's my daily driver. I can keep it on the road while building up the 4.3. After I get everything and it's assembled, I can drop it in when I'm ready.

Maybe it's just me, but I can never seem to find a block that I want for a price that I don't have to take a loan out to get.

I don't even know if this project is going to pan out. I just wanted some oppinion. I'm going to put a charged engine in the RS with the next engine. I just haven't desided if it's going to be a 355, 383, 4.3, or a 3.8. Of course your idea of a 302 sounds interesting.

[LL6]

I keep hearing cost...

I'd put my $$ in a decent V8. Turbo anything is going to cost you a lot more than building up a V8.

[Chvywolf]

I was refering to the cost of fabrication and that is all. Sorry I forgot to post that. Trying to fit TT under the hood with a V8 looks like a major pain. I think Skulte wrote somewere he spent $800 on headers alone. I know a project like this will cost some bucks. Maybe even more than it's worth. But it should to be fun to see the end results. If it ever starts that it. Besides, if I was in this for the money, I wouldn't be in it anymore. I don't get any back.

So don't get mad just because I'll be 5 min away from you and I come by asking for help, tools, and moral support all the time. At least till you leave. :D BTW, I saw that Starsky and Hutch car down the road from you. Thats just wrong.

[GMC-YA]

HAHA no problem Tom, but I think you were under the impression that I meant buying factory parts to do this. The aftermarket for the TTA/GN is way beyond what there is for the syclone. Parts are cheaper and more plentifull, go do a search on EBay for grand national stuff then do one for syclone stuff. Virtually every part is made by the aftermarket. Steve, here is a very good discussion on the 4.3 engine and some of the differences year to year, http://www.syty.net/phpBB2/viewtopic.php?t=15032&highlight= Also steve you sould think about keeping it single turbo, a properly sized single turbo will make all the power your car can handle, plus it would help keep cost down. Keep in mind that boost makes more power than compression, I think for every 2lbs of boost it equals about one point of compression, so keep it around 8.5:1 and throw boost at it like Tom said. Here are some more good sites. http://www.arautosports.com/ http://www.geocities.com/burhead88/camaro.html I know it's for an LT-1 but its the closest I could find. HTH

[ June 19, 2002, 19:53: Message edited by: GMC-YA ]