GTX engine question

[JustinGT]

i got an offer today from my friend about a 1.8L GTX motor. but the engine is really unknowin about the condition of it. ok here's the story. friend of mine got the 1.8L GTX motor from an importer to put in his 1st gen 323 sedan, you know the FWD B6T version. anyways he sold the B6T and got the 1.8L GTX, but he sold the turbo and manifold. and had one custom made with a huge turbo on it (not important tho) so he is using the B6T tranny and axals on it, and he was running a full standalone system with multi coil pack ignishion, like the miatas run. but he could never get it to run right, it ran but really rough like something wasn't right. so pretty much he gave up. he thinks it's the rings, but there is no way to really tell other then a rebuild.

so i was going to buy the 1.8L GTX motor minus the turbo and manifold. since i am not going turbo, but a supercharger. so i think it might be a good buy. maybe he wants about 300 for it. what do you guys think?

i don't think he ever did a compression test (i don't know why) and i am not sure if i can do a compression test now since there is no ignision source. so i could be throwing away 300 to a 1.8L GTX motor thats garbage, or i could send it out, and get it rebuild, or i could rebuild it. do you think i would throw my money away for this GTX motor thats kind of no idea whats wrong with it.

also with a B6T tranny and axals fit in a 93 323? i read once that the B6T tranny didn;t even bolt to a 1.8L GTX motor.

i can get a stock ok milage 1.8L BP from a protege for the same price as the GTX motor and buy just the head from the GTX motor for the cams for cheap. and the manifold. for aroun 140 bucks

is the GTX motor really worth this headake since i am not even running a turbo on it. and i am keeping it pretty stock, other then the SC at low boost with an FMU & FR, but stock ECU / rx7 VAF, and cam gears, maybe a head job in the furure. along with the GTX intake manifold.

an thoughts would really help me out.

here's a pic of how it pretty much sites minus the piping and the standalone

[dave0r]

The B6T gearbox fit the 1.8lt BP blocks
just the bolts for the sump dont line up ...no biggies as the Block ones do

a BP is worth rebuilding , they can make lotsa power if tuned correctly

i think the B6T axles coming from a BF series car are shorter than teh BG
so they may not fit

the Stock GTX ECU will be good for around 130-150 wkw if tuned correctly and all supported modz, fuel, turbo, injectors etc...

but ya carnt beat Aftermarket

[JustinGT]

so you saying get the BP or the BPT?

JustinGT

[dave0r]

just rebuild the 1.8lt GTX motor a.k.a BPT

find a a n/a head from a BP to use instead..you'll get more top end in the long run with modz

i rebuild my BP after blowning my BPT engine, completely forged etc...well worth it as i can run reallly high booost and not worry to much

do the normal things like the exhaintake cam mod, P&P on the head etc


you say your going to Supercharge it....what charger are you going to use??
the BPT has 8.2:1 CR so thats low enough for 18+psi with to much to worrie about
, you'd really wont to get a 9.0:1 for supercharging if you keep the boost below 12 psi.
in NZ we turbo heaps of N/A's and they go very hard...but start to brake after 13 psi

[dave0r]

i just noticed something about that pic

shouldnt the coils be firing coil 1 (1-4) coil 2 (2-3) ??? not coil 1 (1-2) coil 2 (3-4)???

the wasted spark order for BP's are 1-4, 2-3

could be why its not running right???

[JustinGT]

it's an M62 found on a 03 Mercedes SLK. can be run between 5 and up to about 14 i believe, i didn;t want to run more then 10, since it;s a Daily driver for half the year.

orginally i was going to get the stock N/A BP and get the BP26 cams and intake manifold, but then i got the offer for thr GTX motor. but you say the BP-05 head has better flow, then i mine aswell just get the N/A BP and swap the cams and intake, since i am not running high psi. and in the future get some B6T rods and come forged pistons and some over sized valves

JustinGT

[JustinGT]

no it has it set up 1-4 2-3 your fallowing the wores wrong, it;s hard to make out.

JustinGT

[dave0r]

hehe i had to look again ...and again... then i saw it....
yes 1-4 2-3

my bad

[FE3-323]

yodu be better off just getting a normal BP the GTX engine is nothing special in itself

[JustinGT]

whats a better way to go for cam's GTX, the exhaust/intake cam or getting a set reground?

and is it true the gtx intake is the worse intake of the 3?

guess i'll go and find a mazda BP soon then and leave that unknowen gtx block there.

JustinGT

[therieldeal]

yes the gtx manifold is the worst of the three. the NA and GTX both have unequal flow... but at least the NA manifold has the redeeming quality of the VICS.

gtx cams should work well for what you are doing, methinks. or you could do the exhintake GTX cam thing like ryan.

-jon

[FE3-323]

turbo exhintake cam FTMFW