5.7L 350

9.1:1 Compression Ratio
Cast Iron 4-Bolt Block with One-Piece Rear Main Seal
64cc Chamber Vortec Cylinder Heads with 1.94'' Intake and 1.50 Exhaust Valves
Camshaft- Lift: .435'' Int. / .460'' Exh.
Duration @ .050: 212° Int. / 222° Exh.
1.5 Ratio Rocker Arms
454 TBI unit 2 inch bores
55 PPH injectors
injector spacer
TBI spacer
Autolite platinum spark plaugs
Accel 8.8 wires
custom burnt eprom chip
hooker ceramic coated shorty headers
B&M holeshot converter 2500 stall speed
holley 255 LPH fuel pump (needs to be installed)
18 psi fuel pressure
160 thermostat





im having a problem finding the right temp sensor unit, the new intake is alot bigger then the old one. any suggestions?


and does anyone have the article to remove the heater control vavle?

it should be dropping in this tuesday, then i gotta get it all running right, new fuel pump and then break it in.


any comments or suggestions?

 

Looks good.

Easiest thing to do would probably be to go to the local hardware store (Lowes, Home Depot, etc.) and look through the plumbing section. They carry a ton of different types of NPT fittings, and I'm almost positive that you can find what your looking for. Just bring your CTS with you, figure out what size the threads are on your CTS, and they try and find a female-to-male adapter that threads into the intake.

I hope that made sense. That was just off the top of my head, I'm sure there's probably an easier way.

Here you go: https://www.thirdgen.org/techbb2/sho...hreadid=242747

 

thanks man! aw wtf my pic is down

 

Borsty... may I say, that engine looks pretty sweet to me. Did you put that together or have it shipped? The plastic around it makes me think the latter but it's still a nice piece of hardware.

 

Your intake will have 1/2" npt ports for temp sensor, get a 3/8" by 1/2" bushing.

 

The camshaft!!! Why!?!?!!!

 

My guess is because it is a 330 HP 350 HO crate engine with the TBI intake and accessories bolted onto it. Those specs are straight off the Ramjet/HO 350 crate.

 

yup its a crate

 

Looks like a nice set-up. Get ready for some healtyh chip work. Your list indicated a custom chip and I hope this means someone will have your car in hand to burn the chips.

 

brian @ tbichips.com burnt it for me, hes a great guy.

 

keep us updated on how it runs!

 

Wait till your car runs first He is good at getting your car to run but you may want to look into the chip work to get the best use out of your new motor. You would hate to leave 10mpg and possibly 15 or more hp out of the mix.

 

lol 15hp , shifty your just being nice. Seriously everyone on the boards that has even aproached the 300 hp level has had to do extensive DIY chip work to get their vehicles to even idle decently let alone make power.

The nature of FI is that you have infinate control over everything, which is great except for the fact that just a few key strokes can have you so far out of wack you give up 50 hp. Granted Brian has some experience, but it is very very hard, if not impossible to get your fueling within 10-20% on your first try. That could be so rich is blows smoke to so lean it blows piston chunks. Getting your pump shot (AE) close is one of those things thats darn near impossible with the data logging rates that these ecm's have. So he'll just have to guess with what your telling him.

That chip will get you running enough to start datalogging and either do the mail back the chip routine for a few months or get the equipment and learn for yourself.

I know, I know broken record

 

reconsider the therm. 180 may be better. in NY cool temps may disallow CL. you wanna datalog that tune for sure.

 

Consider:

330 fwhp crate motor using the head/cam provided, and assuming that you have an exhaust system up to the task.

55 lb/hr injectors are what's stock on the 180 fwhp non-police LO5 TBI engine. i.e for reasonable duty cycle on the injectors, the 55 lb/hr injectors are adequate to support 180 fwhp. I know you're going to run higher fuel pressure but the fuel delivery is still only going to be around 40% more than stock via sqrt(18/10).. which is close enough to sqrt(2), so you're injectors will be able to supply around 40% more than 180 fwhp worth of fuel at the same duty cycle and VE as the LO5 would, so that's 72+180 = 252 fwhp. 252 is MUCH less than the 330 rating on that crate motor.

See the problem? So it's not going to be JUST tuning.

The 454 TBI can flow enough air, the crate motor can pump the air, but per the above you will need a LOT MORE FUEL, and no ECM tuning can provide the miracle fuel to suit the demand from that engine. And you will want it to run well at part throttle, in addition to WOT, so that's exactly why several people here are hinting at an extensive tuning cycle, and I'm more than hinting at inadequate fuel because you don't have enough fuel injector. FWIW.

 

55 lb/hr injectors will feed the engine if run at 32 psi. I would use an external vacuum adjustable EFI fuel pressure regulator.

68 lb injectors will support 375 hp easily if they are run at 32 psi. In effect I could feed an early model LT1 350 with 68 lb/hr injectors running in a late model 454 TBI regulator/injector pod with the right tuning.

Here are some calculations. All calculations are based on a BSFC of .5 lb/hp/hr and a 80% duty cycle as well as stock fuel pressure. I have also added the potential for you VAFPR fans.

40 lb/hr 4.3 injectors = 128 HP
40 lb/hr 4.3 injectors (with VAFPR @ 20 psi) = 172 HP
55 lb/hr 5.0 injectors = 176 HP
55 lb/hr 5.0 injectors (with VAFPR @ 20 psi) = 237 HP
61 lb/hr 5.7 injectors = 195 HP
61 lb/hr 5.7 injectors (with VAFPR @ 20 psi) = 263 HP
68 lb/hr 5.7 injectors = 217 HP
68 lb/hr 5.7 injectors (with VAFPR @ 20 psi) = 293 HP
68 lb/hr 5.7 injectors (with VAFPR @ 20 psi) = 293 HP
90 lb/hr 7.4 injectors = 288 HP
90 lb/hr 7.4 injectors (with VAFPR @ 20 psi) = 388 HP

 

front wheel horsepower?????

 

Flywheel/Flexplate Horsepower

 

Here's my deal about Brian. He sells me a chip for a decent price to illustrate to me that there is indeed untapped potential in my car. He is a nice guy with service after the sale above and beyond everyone (well, except Summit). I read on this forum and all the DIY forum that there is even more of that potential to be had. This piques my curiousity and eventually (soon perhaps) I'll begin to datalog. After that, I'll be looking to burn some PROM's (or start begging BIN's via PM. hehe).

For someone at my experience level he's the right guy, with the right product, for the right price. I'll always concede that doing it yourself for your own car will produce better results in the long run. Broken record be damned.

 

Id get 80 pphs and see where it all falls when you start tuning. Basically youll have to balance the WOT and idling fueling. You can add alot more fuel at WOT, but then youll be doing the PW limbo at idle.

 

are there any shops that do custom tuning with TBI?


im sorta computer retarded

 

oops, I didn't catch the 55 pphr injectors, yeah that ain't gonna work ( insert hillbilly acent here)

Cadillac, I completely understand where your coming from, and I agree for some people (or most) a mail order chip from brian is going to be the way to go, because either 1 they don't want to or can't learn chip burning, or 2 their combo just doesn't warrant the time and effort and money it takes to get into DIY tuning. With that said, you have to trust the guys that have taken the time to learn chip tuning and get a feel for what these ecm's can handle mod wise and still run decently or run at all.

If we say a certain combo is going to take xx injectors, and lots of chip tuning then we say that because we have several years of research and over 500 chip burns that have tought us that. At least thats the experience that I have, quite frankly I'm a slow learner. It took me 6 months to get my car to run anywhere near as well as it did with the carb, and I'm still improving things today 2 years after I got started. Even guys like Grumpy and Rbob couldn't burn you a chip from a list of mods that would get you the 80 to 90% that Brian is claiming. Keep in mind that those guys are the guys that worked on making DIY tuning a reality for the rest of us.

 

Using those two might be a bad example, as they could probably burn the perfect chip in their sleep....

But I agree though. Borsty, take full advantage of the knowledge that Grumpy, Rbob and the rest of the DIY tuners are sharing. They don't have to be doing this, and when someone profits off of their hard work... it's literally like a slap in the face to them.

I know, I know, some of us don't have the time to invest. Well, neither do I, but that didn't stop me.....

 

they probably have a 330hp 350HO chip in walmart by now

:don't hit me JP ( when is the next road trip? )

well tbichips.com is kinda like a walmart, everyone goes there to buy cra.....

 

Quote by Dim: Id get 80 pphs and see where it all falls when you start tuning. Basically youll have to balance the WOT and idling fueling. You can add alot more fuel at WOT, but then youll be doing the PW limbo at idle.

i upped my FP from 13 to 16 to 20 and my idle went to crap. seems surginging and erratic A/F (on WB) resulted. i just upped by idle speed to 900 from 700 and that seemed to help a little. i think i am going back to 17 and see if that helps. that means reapprocahing VE/AE again. dam.. may run OL and try that first.