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reckedracing · 11-01-2006, 09:54 AM

I am looking for info on this head swap

background
16 valve MPFI tracker motor = G16A
bottom end is shot
have a good 8 valve TBI motor

8 valve and 16 valve have diffrent valve reliefs in the pistons

put the head on, timing belt
seems to turn over with no clearance issues
anyone know anything about this?

Cashizslick · 11-01-2006, 11:31 AM

Just throw a rotory in it

Celerity · 11-01-2006, 08:17 PM

What year are these motor / head combos ? I know this stuff, but only by year.

Also, I thought my gf's Tracker had a SOHC, but after close inspection (Yeah, I know.. it sounds strange) it turned out to be a staggered DOHC.

As I know, lots of these motors cross-over from other years that you wouldn't think. Even the VW Diesel swaps are neat.

reckedracing · 11-07-2006, 01:53 PM

well, it turns out it did work

it was a 94 MPFI 16 valve tracker
book said stock compression is 190, minimum is 170
this one had about 100 across the board

we picked up a 92 auto for a hundred bucks but it was TBI 8 valve
so we decided it would be a good field/woods car
it was a damn good runner too, but started puking auto trans fluid
so we decided to call auto zone and get head gasket part numbers for the 2 models
same headgasket
so we pulled the 92 8 valve
found out the front trans seal had just spun out thus the trans fluid leak

so we ripped the 92 motor down to swap out the 8 valve block as the rings were smoked out of the 94 block
once we got the 94 motor out and the head off we noticed the diffrence in valve releifs in the pistons them selves
fuck it, threw the head on with a timing belt and it spun over with no interferance so we figured we'd try it
needed to use the 16v timing belt cause its longer and also wider so we needed the 16v crank gear and tensioner

everything else went together very well and its runs and has a decent amount of power

swap complete

NissanNiNjA2nd · 11-07-2006, 08:59 PM

I salute your grassroots power.

reckedracing · 11-08-2006, 10:12 AM

thanks

phat87mazdarx7 · 04-09-2007, 09:15 PM

I am just curious how did you get it to run, did you use the original throttle body injection or did you wire in the multi port some how.

klyph · 04-10-2007, 09:06 PM

The Tracker was originally MPFI. He put the TBI short block in it.
It's in the thread.

phat87mazdarx7 · 04-10-2007, 10:52 PM

but im saying what car is running now, is it the car with the mpi or the tbi?

if it was the tbi car how did you change out for the mpi

klyph · 04-11-2007, 03:21 AM

Quote:

Originally Posted by reckedracing

16 valve MPFI tracker motor = G16A
bottom end is shot
have a good 8 valve TBI motor

Quote:

Originally Posted by reckedracing

it was a 94 MPFI 16 valve tracker

Quote:

Originally Posted by klyph

The Tracker was originally MPFI. He put the TBI short block in it.
It's in the thread.

^^^

11-01-2006, 09:54 AM	#1
reckedracing TTIWWOP Join Date: Dec 2002 Location: 845 Area, NY Age: 28 Posts: 14,258 iTrader: 0 / 0% Ride: 1990 sohc vtec-t hatch, 1994 Bagged S10, 1991 Lifted Mazda Rep Power: 228	Geo Tracker 8 valve block 16 valve head I am looking for info on this head swap background 16 valve MPFI tracker motor = G16A bottom end is shot have a good 8 valve TBI motor 8 valve and 16 valve have diffrent valve reliefs in the pistons put the head on, timing belt seems to turn over with no clearance issues anyone know anything about this?

11-01-2006, 11:31 AM	#2
Cashizslick Senior Member Join Date: Aug 2003 Posts: 3,853 iTrader: 0 / 0% Rep Power: 69	Just throw a rotory in it __________________

04-09-2007, 09:15 PM	#7
phat87mazdarx7 Member Join Date: Mar 2007 Posts: 45 iTrader: 0 / 0% Rep Power: 0	my mom just got a tracker too I am just curious how did you get it to run, did you use the original throttle body injection or did you wire in the multi port some how.

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11-07-2006, 01:53 PM	#4
reckedracing TTIWWOP Join Date: Dec 2002 Location: 845 Area, NY Age: 28 Posts: 14,258 iTrader: 0 / 0% Ride: 1990 sohc vtec-t hatch, 1994 Bagged S10, 1991 Lifted Mazda Rep Power: 228	well, it turns out it did work it was a 94 MPFI 16 valve tracker book said stock compression is 190, minimum is 170 this one had about 100 across the board we picked up a 92 auto for a hundred bucks but it was TBI 8 valve so we decided it would be a good field/woods car it was a damn good runner too, but started puking auto trans fluid so we decided to call auto zone and get head gasket part numbers for the 2 models same headgasket so we pulled the 92 8 valve found out the front trans seal had just spun out thus the trans fluid leak so we ripped the 92 motor down to swap out the 8 valve block as the rings were smoked out of the 94 block once we got the 94 motor out and the head off we noticed the diffrence in valve releifs in the pistons them selves fuck it, threw the head on with a timing belt and it spun over with no interferance so we figured we'd try it needed to use the 16v timing belt cause its longer and also wider so we needed the 16v crank gear and tensioner everything else went together very well and its runs and has a decent amount of power swap complete

11-07-2006, 08:59 PM	#5
NissanNiNjA2nd Senior Member Join Date: Mar 2004 Posts: 1,515 iTrader: 0 / 0% Rep Power: 31	I salute your grassroots power.

11-08-2006, 10:12 AM	#6
reckedracing TTIWWOP Join Date: Dec 2002 Location: 845 Area, NY Age: 28 Posts: 14,258 iTrader: 0 / 0% Ride: 1990 sohc vtec-t hatch, 1994 Bagged S10, 1991 Lifted Mazda Rep Power: 228	thanks

04-10-2007, 10:52 PM	#9
phat87mazdarx7 Member Join Date: Mar 2007 Posts: 45 iTrader: 0 / 0% Rep Power: 0	but im saying what car is running now, is it the car with the mpi or the tbi? if it was the tbi car how did you change out for the mpi

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Geo Tracker 8 valve block 16 valve head