95batmobile

iTrader: (2)

i am looking into getting a rear mount t3/t4 or a t72... which would you guys recommend? the mods are all in the sig and its a 95 ta a4... with either turbo im gonna run 8 pounds... but the guy i talked to said go t3/t4 cause it will spool faster...

also what kinda power will i be looking at with 8 pounds? or what 1/4 mile time... im sure this gets asked all day everyday

yelo04goat

iTrader: (11)

Tc 76. I happen to know where on is for sale.

ZL1Killa

iTrader: (17)

you will need 50# injectors and likely two fuel pumps. you will want to trash the long tubes.

you can see my rear mount build in my signature. I recommend at least a TC 72 or 76. no bigger than a 76 with the race cover if you want to go big or go home. anything else done to the engine? it is a LT1 right?

don't know if you need to beef up motor components or not on those... I wouldn't run more than 8lbs of boost on the stock motor. I also would run TR6 NGK plugs.

with your motor at its current state, I would get the 72mm, but if you are going to do more mods later on, get the 76 and it will let you make more power and have more airflow throughout

95batmobile

iTrader: (2)

50# with 2 pumps only pushing 8 lbs? why is that? and what you want me to do about the long tubes? are the stock ones better? but ok ill prob be going with the 72

95batmobile

iTrader: (2)

i dont know if 8 lbs is too much for a lt1 or not either.... but if it goes boom ill just build a low compression lq4 and do it right

ZL1Killa

iTrader: (17)

oh woops. 8lbs you may not need 2 pumps. what else do you have done to the motor... literally just what is in your signature?

I know for a fact you will need 42# injectors minimum. the reason I mention getting rid of the long tubes is you lose soo much of you heat through them, sure wrapping them all up helps. feel free to try it.

Read my thread, and Zombies thread.

boosted LT1

iTrader: (3)

Manifolds will make boost a LOT quicker and are fine to ~500 RWHP (opinions on max vary but well above where you will be)

I agree and recommend >50 42 are marginal for even 8 psi, I went I think it is 60 or 63 on my rearmount can't remember and that was with the 191/196 cam. I have forged pistons the stock are OK to ~8 psi if you control knock.

I had a cheap ebay T70 (really a 60 MM) and now changing to a Master Power T76 with 4L80E.

boosted LT1

iTrader: (3)

Also along with the 42's I had methanol injection and had ~90% DC with the Ebay T70 so with a decent turbo the 42's trully are marginal.

To verify you can use an on line calculator and figuring with 8 psi you should be 400 - 425 wheel or ~525 Flywheel you can see what the calculators recommend.

And I would recommend a T4 flange because that will allow a wider selection of turbos that are capable of the power you will make.

I run Autolite I think 104's can't remember and also you might as well get an MSD box since around 8 psi you will likely have spark problems. Get the 6AL then you can use a twi step definately a MUST for a rearmount to make boost on launch. Day and night difference

Good luck

ZL1Killa

iTrader: (17)

what are these spark problems you speak of? Use a one stage colder plug. Is this spark problem with LT1 ignition systems and not LS1? Do explain, I'm curious

JoshuaGrooms83

iTrader: (2)

I think the spark problem is an LT1 thing since they dont have Coil on plug like us LS guys.

95batmobile

iTrader: (2)

sweet this is alot of good info... i will start looking for some injectors then... i have a ported intake and 58mm tb that im putting on, would this make any difference for power?

also i have a 6al box already... so that works out nice lol

boosted LT1

iTrader: (3)

On the boosted LT1's I have seen ~7 psi spark begins to get iffie...even with closed gap and colder plug. Some get lucky and reach higher boost but any problem will always make you wonder is it the spark fading. IF you run colder plug, closer gap and MSD coil 8 psi is probably ok...but add an 6AL and I have run 22 psi so always better to set it up to never fail than to save a few $$$ IMO

I think LT1's benefit from ignition tweaks. But I am sure some have had success, like the opti some have trouble others seem to work without any problems.

boosted LT1

iTrader: (3)

I can't remember the brand but the one style is very tuneable I have the 93 lbs in my Z and no problems getting it to idle. I idle at 700 with no problem with a 232 cam

I have a 52 mm on both my LT1's so IMO not enough to justify the loss of drivebility (and the Datsun hasn't been on road yet, and may never be).

Yes with the MSD coil it will ensure the spark is always there and a two step is a MUST!

You will love a two step and simple to add to an MSD box.

Good luck

95batmobile

iTrader: (2)

ok well i have a complete msd set up for a lt1 so im good there...

so aside from the turbo kit. is all i need is some 42ls injectors? do i need a 255 pump or will my stock be fine? how bad will i need an intercooler? and is there any writeups on a front mount for a lt1 cause i dont have a problem cutting a whole in my license plate spot for air flow... i just wanna be able to do it right.

tripblackls1

iTrader: (11)

42lbs injectors are the very minamal you could get and are going to leave you no room to grow, get at least 60lbs they only cost a few buck more now vs having to buy injectors aging later
you will need at least one 255 pump but while your in there might as well put two, so once aging you dont have to redo stuff later (put the second one on a hobbs switch)
and yes you really need a intercooler, search around in here theres tons of intercooler threads

95batmobile

iTrader: (2)

http://cgi.ebay.com/ebaymotors/Sieme...Q5fAccessories

will these work? im not sure about whcih 60# injectors to use

95batmobile

iTrader: (2)

bumppp would those work??