Wont affect gas mileage
Linkage kit is 150 no egr valve provision though

Just port your crossfire it will keep you busy..make the most of what you got.

 

I likey ... Thanks ... looking for those long carbide's now

 

if you need a hand with that crossfire Im not too far away.
Jump up to the 210 W and cruise for about an hr

 

^Thats opportunity knocking!^ There are a few good posts on porting the xfire intake including a cross section on here somewhere. I

http://www.technovelocity.com/chevyh...rt_polish.html

I have a few other links that I have found usefull if you would like.

 

Yes yes and so yes .. Been trying to find them on google and X-bay ... close but no cigar yet ... would you happen to know a way to source these long alum cutters ?

 

Im on this .. Big time .. I owe yaz
trying to source the long bits for my die grinder now ... cant find them yet ..Hmm ?
If all else fails .. super retail Tools-R-Us will have them $$$

 

It sounds like your goals and budget are in conflict. "the absolute limit for street drive ability" -to ME, is 600-800 hp. Which is ridiculously unnecessary. Re-assess your goals.

BTW, you want "absolute limit..." but are worried about gas mileage??

IMO: Port your intake, throw some GOOD exhaust and a converter at it, tune it. It will be an entirely different car than it is now for <$1000.00 if you shop smartly.

 

Give me your telly or cell .. maybe a chat .. my email is GT2Race@yahoo.com
Lawrence fro

m San-Bern
10 miles west of Fontana Speedway
my cell is 909-717-5260

 

About an hour + lol

You wont get 5-600 out of it but it can be pretty decent.
Bring your intake out Ill get you started and send you home with a few things to use and a source if you need more.

 

Dont leave the rest of us out of the loupe! I wanta see the chips flying.

btw;http://www.carbideplus.com/category_s/350.htm

 

Great stuff .. Im on it .. just got off the celly with RK .. an amazing dude with a wealth of offered help and info .. Looks like We will be re-shelfing that Wiend x-celorator intake and the Holley spread bore ..

Sticking to a Massive attack on the X-Fire intake porting chore .. with help and lots of it !
Cmon now .. you get my drift .. wish I had your $$
Im pulling the Die grinder out ... just take that as an indication of my Budget .. lets get on with that one in mind

Can you please advise me on Cam Limits ..
not so much lift but maxxed duration limits .. a need

Want this stock looking 350 to run like a " Budget Motha "
will use a flat tappet hydrollic w/ 1.5 rockers , 624 heads ( maybe a bit of porting-maybe a lot)
stock 700 tranny and converter , same with rear gear ratio ..

Liver transplant recovery and SSI income for a spell .. ah &%%@#

heard a Rumor that you may lend some Wisdom on Cross-Fired Intakes
head porting and Cam limit advise is good
using the crossfire TBI's and Old slow simple ECM .. keeping things simple again ... Bottom line .. Advise is Heaven for this Old Centurien

cheers / Lawrence

 

You said that you want to keep the ECM stock. No problems there...I did. Cam limits depend on what is "acceptable" to you, drivability, fuel economy etc. wise. Basically, you need to keep the duration-to-displacement ratio close to stock, or you're going to start sacrificing Drivabilty, Economy, and Power proportionally to how far you go with the cam. "how far you go" is a personal compromise, that I can not answer for you. I ran a 224/234 cam in mine on the stock computer, has a stock like idle, great tq and power and 24+ hwy mpg....but that was on a 400 CID engine. That cam was LIKE a stock cam in a stock engine -the 224/234 cam in the 400 made a similarly SHAPED tq curve as stock...only higher up.

As you add duration, you change the SHAPE of the tq curve (given the same displacement). You can change the shape some and get away with it, but as you change the shape more, trying to accomplish fueling for both no load/idle and full load/peak tq w/o ECM tuning becomes impossible.

IN SHORT, I'd keep duration close to stock. I'd keep it around 210* or less. I'd increase breathing with intake, exhaust, and (if funds allow) fantastic heads, and more valve LIFT, then I'd "feed it what it wants", fuel wise, using injector sizing and fuel pressure....just like I did on mine. I ended up using 90pph injectors, 15 PSI "no vacuum" fuel pressure, and I used a Marine TBI application FPR (with my stock spring installed), which is a vacuum referenced FPR and with the spring I used, ended up with a FP of ~10 PSI at idle/18" vacuum. You can play with "ratios" with that FPR by changing springs, injector size and set pressure.

I haven't ported heads so have no advice there. My advice would be to get some used Vortec heads and make them work. But if you have time and don't mind grinding on cast iron...go for it; it's basically free power.

 

I am assimilating ... I'm carbon based ... and especially thankful for the advise ...

 

sitting and thinking here agin .. ECM Dum here but certainly have a need to know ..

Seems the unit is the heart beat for camshaft limits and much more ...
Assuming, The device is the heart of My C4 350 ... so knowing this

Advise on making the best of this cross fired TBI system is the goal
And .. the how to simply understand what ECM's really control would make life simpler for my Old brain

Advise What add o'ns proms or piggy backs are available and what changes can be made to the give me max performance on this limited ssi income

Free horse power is my best friend
Got die grinder will travel ... all else ... Help needed

 

If I have some major down time, I'll take a stab at explaining how the ECM works, but for now, I'll answer the part of your question about add ons/piggy backs.

Options for the CFI specific computer are replacemnt chips. Hypertech, ADS used to make them, Turbo City, I think did too, and a company called DCS currently makes one. There are two problems with these, as I know it;
1. I have never seen or heard of a chip for a CFI car that made a documented improvement. In fact, all I've ever seen or witnessed is that chips made stock or stockish cars slower.
2. The tune (in the chip) is for the engine/conditions that were present on the day and with the car that the original tune adjustments were settled on. Your car is different, you live in a different place, and you're about to perform hard part changes -which will move the requirements way out of line with what the replacement chip was going for. While the chip should (in theory) be able to adjust for changes in weather/temps/altitude, like I said, I've never seen these chips HELP anything. You can do better "tuning" (I feel) by manipulating fuel pressures and base timing.

What you'd ideally need to do is burn your own chip/tune, that is optimized for your combo. That requires you to change computers to one that has aftermarket/tuning support and hardware, then learning how to tune. A process. This is why I gave you my best advice for what I thought of your situation, above;

By "tune it", I meant using hard parts like injectors, pressure, and base timing. You can get a lot out of just that; more than 50hp increase, which is pretty huge for the $$.

 

Thanks Tom sounds like that may be the answer for now.
'If he can get a a truck TBI computer in there than maybe we can find him a tune. I dont have the kind of time it takes to learn

Doubt the smog guy would notice and if he did it should be a non issue as the 84 stuff is NLA anyway

First thing is geting enough time in that intake..I dont see how the top can be accessed to really go nuts without cutting the outer walls off (welding together later) to get your tool in there. There are extensions to go in from the bottom but that seems like a super huge pain for little progress/time given

 

That's the only way that I know of, to do it (going in from the bottom), and it IS a PITA. Your idea of cutting>porting>welding is an interesting one. Maybe drill a 3/4" hole in the outboard wall of the plenum, aligned w/each runner? Then just fill that hole w/either weld, pipe plug or epoxy?

 

Yes if it was mine Id cut it and have it welded up its not a big deal.
Sure would get better results I think and surely save a lot of time.
Up to him though just trying to help out..get the most out of what hes got due to budget.
Those heads well.... sure they can be squeezed for some power though. If the intake exh was decent with a small cam, converter bet he could have a decent running car maybe better than hoped for. It wouldnt lope but so what. thats overrated anyway

 

Hole eeeh donut .. sounds very possible .. just need an eyes on view ( stuck here in hospital for a few more days ... than straight to the Man Cave for an assesment .. I certainly will let you know ..

 

http://forums.corvetteforum.com/memb...0&ref=gnr-next