tbi swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gafiredog · 05-31-2013, 06:27 PM

will a tbi from a 89 5.7 work on a 89 7.4 ?

*JCampbell* · 05-31-2013, 07:24 PM

Negative. I mean, it'll bolt on, but the bores and injectors aren't large enough for the 454. Also, the IAC connector is different.

gafiredog · 05-31-2013, 09:05 PM

Thanks, Jason

andrewmp6 · 06-01-2013, 01:53 AM

Yeah find one off a 454 hit up the junkyards gm used the 454 tell like 99 in the 1ton trucks.

kevinr1970 · 06-03-2013, 03:40 PM

Quote:

Originally Posted by andrewmp6

Yeah find one off a 454 hit up the junkyards gm used the 454 tell like 99 in the 1ton trucks.

But it was only TBI until '96(?), at least that is when the 5.7 changed over to MPFI.

JAMESCHURCH13 · 06-05-2013, 01:12 PM

I have an intake and TBI set up I took off my 87 454 and converted it to a carb.

05-31-2013, 06:27 PM	#1
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 195	tbi swap will a tbi from a 89 5.7 work on a 89 7.4 ? __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)

05-31-2013, 07:24 PM	#2
JCampbell Account Suspended Join Date: Apr 2008 Location: Hesperia, Ca Posts: 1,332	Re: tbi swap Negative. I mean, it'll bolt on, but the bores and injectors aren't large enough for the 454. Also, the IAC connector is different.

05-31-2013, 09:05 PM	#3
gafiredog Registered User Join Date: May 2008 Location: metro Atlanta, Ga. Posts: 195	Re: tbi swap Thanks, Jason __________________ Art 1975 c-10 stepper 1978 single cab dually 1987 crewcab dually 1986 crewcab single wheel 1948 anglia- (the dixie twister super gas)

06-01-2013, 01:53 AM	#4
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: tbi swap Yeah find one off a 454 hit up the junkyards gm used the 454 tell like 99 in the 1ton trucks.

06-05-2013, 01:12 PM	#6
JAMESCHURCH13 JamesChurch13 Join Date: May 2006 Location: Edwards AFB Sunny California Posts: 151	Re: tbi swap I have an intake and TBI set up I took off my 87 454 and converted it to a carb. __________________ *HG/FTW!!!* Current vehicle collection: 1968 Chevy C-10 SWB Fleet Side, 327ci, TH350 (MD) 1987 Chevy Dually Quad Cab, 427ci, TH400 2008 Buell XB12SS, 1203cc 2006 YZ450F Wheelie Machine! 1997 Suzuki Bandit 600cc And the Wife has some cars I pay insurance on and use to transport the kids!(01' Grand Cherokee and 06' Pontiac Grand Prix)



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