You will need to find a T56 out of an LT1 car. Also, you will have to do chip work to get your new motor of choice to run right. That really isn't a big deal though because you can data log and send the info off to a burner if you cannot do it yourself. One day you will though so that you can get every last bit of power out of your combo.

 

Not true my 305 makes 250 at the rear wheels with only port matched cast iorn manifolds.


I am swapping from edelbrock 600 cfm to a TBI setup off of a 350 as soon as I graduate on saturday. I will do it next week, when my parents go on vacation and I have an extra vehicle to drive. I wonder if my power will stay the same or go up. The TBI intake llooks to be a decent piece. You can see from one side to the other. I am going to port match them and elongate the bolt holes. The intake looks to be a highrise but with fairly small ports. I have a neighbor that has a bridgeport so I am going to open up the throttle body holes to 2" so I can step up to a Holley TBI unit someday. I am using a "747 ecm too.

 

i doubt you are making that much hp, how did you come up with those numbers. Those are better numbers than an LT1. With that much power you should be in the low 13s, not low 15s.

 

90mph traps roughly 190-210 RWHP

btw, if you are realy making 250hp, what do you think you COULD make with headers.

 

A chassis dyno doesn't lie.
Notice what it is in a 4,500 lbs brick, if it was in a F-body it would be in the 13s.
I would have headers if I could find smog legal ones for this application.

 

sorry, i didn't notice it was in a van.

but you are alos on a 350, not a 305, so your power numbers are not a good indicator, 250 hp is not exactly a milestone with a tree-fiddy.

 

Nope the van has a 305 in it not a 350. It came from Gm with a 175 hp 9.2:1 LE9 305 4 bbl. Here is the HP calculation for 4,500 lbs.

Simple Horsepower Calculations

--------------------------------------------------------------------------------
Using the ET method, I come up with 248 horsepower
Using the Speed method, I come up with 256 horsepower

Here is that sight for everyone.

http://www.dsm.org/tools/calchp.htm

 

222 rear wheel HP at 5100 rpms. consevative timing tables. some HP left on table or in chip if you must. new cam will affect the #'s will run again(dyno) mid summer.

 

what mods are you running to achieve 250 HP. Basically you are saying that you have gained 100HP over what your crate engine put of in stock form.

 

first off you have duals, which means you arent running our ****ty y-pipe which is half of our exhausts problem. Second I'm not familiar with your manifolds, they could very well be different than the lo3's seeing as you have a le9 was it? and third, good job getting 250 hp out of a 305, thats my goal after my cam, heads, and intake swap this winter.

-chuck

 

i think all wait, and save up for a built 350...

anything that i can do now to get power....

heres how it sits as of now :lala:

 

ops wrong one :lala:

 

Get an open element and a full 3" catback exhaust or 3" all the way with high flow cat and headers if you want to spend that much. That would really wake up the engine, believe me.

 

With Ebay, anything is possible. But if you're paying standard, new price, then I don't see it happening.

DISCLAIMER - I didn't read this whole thread.

 

Hey Needs. My third gen is blue too. I put on an open air element, and I have a Flowmaster catback. Big difference. You can buy a Spectre element for 20 bucks at Kragen, Autozone, just mind your coil wires in the back. My air cleaner was hovering dangerously close to those wires (stock one is notched out), so I notched the metal in the back, so if there was contact, it would be with the rubber gasket of the air filter. Also used a spacer. K&N's the best though, and buy an X-Stream filter lid.

Also, Slick 50 does wonders, I'm convinced, and I know another guy with a high mileage Bird that runs like new thanks to PTFE. K&N makes a good oversize oil filter too. Slap on a Ram Air or Cowl Induction hood, or make your own scoop with a modified cat litterbox, and, with the new intake, you have just gotten at least 15hp over stock. Plus a burly intake sound.

Forgive me if you know this already. Trust me though, your open air element will have you smiling and your motor screamin'.

See pic of another TBI engine bay, not mine, although mine looks similar.

Also, Berryman's Fuel Injector Cleaner is AWESOME stuff. Slick 50 too, and Castrol GTX 20/50, you will feel the Power!

Then, ya, getya a nice 350 TBI crate motor down the road instead of a rebuild, or follow the messiah's on this site who can get you 300+hp on your 305. Happy motoring!

 

A stock 305TBI can beat more than half the cars on the road today.

I would give it a thorough tuneup. Have someone rebuild (or clean) the TBI, change out all the fluids, etc. Because you may run into costly problems after you add peformance parts.

I would like to put a TPI-style snorkel setup on the TBI.

EDIT: For now, I put my stock snorkel underneath the bumper.

 

Akshay, any pics of what that snorkel setup looks like?

And what do you guys think of the Edelbrock air cleaner I have? I had to use a wingnut up through the center of it, but it sounds pretty ***, and I seem to get better response. I also bored one of the holes in the bottom to accept me air temp sensor. Oh yeah, it has a slight raise to it, so all my linkage clears too

 

i have never been impressed with those style air cleaners myself. to many stories of them catching on fire or being sucked into the intake.

here is what i run.

 

Cool, Dewey.
I would eventually like to setup a good looking cold air setup. I think it would sound probably just as nice, but with cooler air.

 

Comin' into the game kinda late here, but thats so true it hurts. Even in completely stock form these cars perform so differently it's impossible to make any exact estimates. There are guys on here that have spent oodles of money on thier car and are running low 15's, high 14's and my car pulled a 15.3 with nothing more than a 40 series flowmaster! Every LO3 is going to react to mods differently. It all really just comes down to how well you can get your car to work with those mods.

Bruce (90RS305)

 

my intake air temps according to the sensors are always very low, colder than most people get with their CAI's. it is all about managing flow in and out of the engine compartment.

 

there is that tuning word again.

I've been reading around these boards a while now and tuning comes up with just about every thread. It really is the key to getting a good TBI system running. Spend $200 on that.

-chuck

 

Quote: thats my goal after my cam, heads, and intake swap this winter.
That will change the VE of the car and make tuning mandatory. i think tuning will cost you a bit more than $200. IMHO.