Cascade Crew

91camaro_rs · Posted: Wed Mar 10, 2010 11:15 pm Post subject: which fuel pump do i need

so when i convert the carbed 305 to TPI what is the fuel pump that i need?

and where do i get a knock sensor lol, dont even know what that looks like or where it goes

also when converting to a V8 do i need to swap anything like driveshaft, rear end or any of that?

aaron_sK · Posted: Wed Mar 10, 2010 11:30 pm Post subject:

Delco shows a different part # between the V6 SFI and V8 TPI in-tank pumps. Might consider upgrading to a good pump if you're gonna build this car down the road. Save you cash and a tank drop later on.

Knock sensor is the little UFO-looking thing down low on the passenger side of the block.

Axle and driveshaft get reused assuming you're sticking with a normal GM trans (no short th350 or anything).

91camaro_rs · Posted: Wed Mar 10, 2010 11:34 pm Post subject:

yeah im gonna get a good pump, can you send me the link to the one you were lookin at or is there a better one i should get?

are knock sensors sold new? or do i gotta find one

ok cool, tranny is stayin 700r4 just one with a V8 bolt pattern haha

aaron_sK · Posted: Wed Mar 10, 2010 11:39 pm Post subject:

The other guys could give you better info on what brands of performance in-tank pumps are good.

Knock sensors you can get new, or JY. Make sure you get the one for a 305, not the 350.

iansane · Posted: Wed Mar 10, 2010 11:41 pm Post subject:

Knock sensors you CAN get new however they're really not a commonly failed item so I'd try to grab one from a yard. Check out the part number from schucks/vatozone and see what all it fits. Probably not much but the 305... Truck sensors may be similar?

I've had a walbro hotwired in my tank for the last five years, no problems. *knock on wood*

91camaro_rs · Posted: Wed Mar 10, 2010 11:48 pm Post subject:

knock sensor is only $35 ill just get a new one

and dang i didnt realize how much fuel pumps are...

are bosch or edelbrock good brands for fuel pumps? im just lookin to see what local stores have before i go to summit or anything

iansane · Posted: Wed Mar 10, 2010 11:58 pm Post subject:

I have an edelbrock pump hanging around here. I don't know what it's for. It's brand new. I'll grab the number off it tomorrow. If it works for you, you can have it. I don't know who makes the Edelbrock pumps though?

91camaro_rs · Posted: Thu Mar 11, 2010 12:18 am Post subject:

ok awesome, im hoping the numbers match

aaron_sK · Posted: Thu Mar 11, 2010 7:50 am Post subject:

You'll have to double check the parts #'s, but Ian's pump should be this one:

http://www.summitracing.com/parts/EDL-17933/

Twilightoptics · Posted: Thu Mar 11, 2010 9:31 am Post subject:

www.racetronix.com

Get the L98 Fuel Pump Wiring Kit for $55 and the 255lph for $100

Never have to upgrade the fuel pump again. Unless you're big block twin screw/dryer.

91camaro_rs · Posted: Thu Mar 11, 2010 12:38 pm Post subject:

ok so if that is the same as ian's pump it will work then

91RSVert · Posted: Thu Mar 11, 2010 12:51 pm Post subject:

The knock sensor is specific to the motor. If your pulling the motor out of them parts cars, it should have one.

Trans is different from v6/v8.

Rear axle has different axle ratio. The v6 is steeper geared which is what most people go to. So you may want to keep it unless one of the parts cars has a lsd/posi.

The TBI fuel pump is very low pressure, like 9-13psi? Where the v6mpfi/v8tpi is like 45psi? However, the v8 is a higher gpm. I have read about people putting the tpi pump on carb/tbi cars and putting an inline pressure reducer.

91camaro_rs · Posted: Thu Mar 11, 2010 1:08 pm Post subject:

do carbed 305's have knock sensors or do i need to put one on it?

91RSVert · Posted: Thu Mar 11, 2010 1:29 pm Post subject:

eh, dunno. Never seen a carbed motor in an fbody in person.

Quasi-Traction · Posted: Thu Mar 11, 2010 2:18 pm Post subject:

91camaro_rs · Posted: Thu Mar 11, 2010 4:27 pm Post subject:

so since i have the LG4 i will need to install one....how do i go about doing that?

chevymad · Posted: Thu Mar 11, 2010 5:38 pm Post subject:

The knock sensor just replaces one of the block drain plugs in the side of the motor. It does need to be torqued to spec though. Overtightening makes them more sensitive.

91camaro_rs · Posted: Fri Mar 12, 2010 12:53 am Post subject:

iansane · Posted: Fri Mar 12, 2010 1:14 am Post subject:

Yeah, Edelbrock 3581. Actually the pump body has AC stamped on it so I'm thinking ACDelco made it for edelbrock? I don't know...

http://www.summitracing.com/parts/EDL-3581?part=EDL-3581&view=1&N=700+400065

Quasi-Traction · Posted: Fri Mar 12, 2010 12:19 pm Post subject: