Budget build.

This is for an engine swap using 5.3 with t56.

Goal is 600whp
on 91 octain with meth injection if needed.

heres the parts list.

stock 5.3 w/ headstud (replaced them 1 by 1)
stock headers flipped and using a 2" crossover.
Ebay gt45 turbo.
38mm ebay wastegate/tial replica
3.5" full exhaust.

front mount IC(most likely 24x12x3)
2.5 feed to IC and 3" after IC
ssq bov

single walbro 400lph
Ls1 intake
Deka 60lb injectors
aftermarket fuel rail. Feed to Y then to rail, Then to a1000 aeromotive FPR.
with return.

Stock t56
ls1 flywheel
ls1 spec 3+


and ofcourse a tune.

im thinking its going to take 20psi to reach my goal.

Usually 20psi is still pump (91) territory. but I have not experience with 9.5 compression.

Will I be okay to run 20psi on pump or will I need methanol injection.

also anything else I should add.?

what do you guys think?

thanks

 

You won't need 20psi to hit 600rwhp... Probably more like 12-15. I think you will want bigger injectors and definitely meth if you want to run boost up around 15psi

 

I think the 60lbrs are too small. Buy injectors once. Not two or three times like me

 

my 65lb injectors are at 60% duty cycle at 14psi boost. this is with an aeromotive 340lph pump

 

op, you will want meth if you are planning to run higher boost levels with 91 pump gas.

 

The list looks great, nice simple combo that will work. 60's will meet your goal but the Siemens Deka 80's are just a few bucks more if you plan on turning it up past 650ish. I don't think I would replace the head studs one by one, I would either leave it stock or pull the heads and slap some LS1 MLS gaskets on it.

 

As mentioned above, the injectors seem small. You don't need 20PSI to make 600RWHP. Don't run the boost high on gas without meth. I would also install new MLS head gaskets when you do the studs.

If you do plan on going to 20PSI I would file the rings or you will likely have problems if you are running gas. What year is the engine you are working with? You might want to consider cam lifters and springs while you are in there. I am not a big fan of an ebay wastegate. They are cheap and look the same, but if it isn't working properly, you can overboost causing damage. I would go with a cheap BOV, and a proven wastegate if you wan to save some money.

 

^^^ thanks for the reply guys.

In regards to the injector I was using this to calculate.

RC Fuel Injection from ls1tech

and according to that.

56lb = 600hp
60lb = 640hp
65lb = 700hp
80lb = 850hp

I didnt realize that they could be talking about bhp and not whp...

so it they are talking about bhp i could indeed be maxing out or close at 600whp.

so what do you guys think is that calculator for bhp?

I was worried about drivability and tunability since its basically 99% dd (with a/c) so I didnt want to fit bigger injectors if I dont need it.

from what people are saying the ebay gt45 maxes out at 600whp? so there is no point on going bigger since my setup has a limit? unless someone here has one running past that or know of a thread that has dyno numbers? then perhaps ill consider going bigger injectors.

Ideally id like to get 700whp but I will be running stock engine, stock t56 and stock m3 rear end so looks like for reliability its a safer bet to just forget that extra 100whp and enjoy the ride longer.



I did however considered the on3 t76... isnt backed by a lot of members like the gt45 but it seems to be gaining popularity.
what i liked about this over the gt45 is its 76mm but smaller turbine so it should spool a lot faster?

the set up may be a rear mount aswell if i cant fit these giant turbo in the engine bay.


with the 76mm I should be running less boost and perhaps wont need meth?
I dont have a problem running one but If i can save a few hundred then thats a few hundred towards other mods



thanks ive considered leaving it stock but it seems people have success doing it that way. if it blows the hg ill just pull it out and have it machine/deck then. ive read some people having hg lift issues with stock bolts under higher boost.

 

You don't want to max your injectors out. So if the 60's will max at 600, you will want a bigger injector to run 600hp daily. I wouldn't want my injectors running any more than 85-90% when it's most important. Hope that makes sense

 

thanks ill keep that in mind.

I havent picked up an engine yet. I plan on picking one up from the junk yard when I have everything else that way i can fire it up and exchange it if its a bad engine.

but im thinking lm7 is my best bet for stock lower compression.
but I really like the l33 because its aluminum.

I was thinking lm7 with 317 heads i should be able to drop the compression to 8.5, at that low of compression do you guys think I will still need meth?

I come from a supra background where we run around 20 psi on 91 oct all day. no meth. and I was thinking If I lower the compression I should be able to run straigh 91 and make 600whp. thats money saved by not buying meth and thats 1 less system that could fail and screw the engine later down the line.

im not really worried about it loosing a bit of torque either since im used to high powered 2.0L turbo and 3.0L turbo. my last project was turbo 5.0 so by far this is going to produced the most torque off boost out off all the setup that ive had.

but in all honesty though when its time to buy the engine id most likely go for whats available.


is there any recommendation out of the 4 different 5.3?



in regards to wastegate, I have tested multiple before and had good luck.
but one i actually got to push high pressure on my talon. 18psi on pump then up it to 25 psi with meth, then i later switch to e85 at 30 psi.
no issues. so ill use that same one and buy from the same seller.

when it comes to ebay stuff like this its always a good idea to open it up and inspect and clean before use. lube if needed but make sure theres no pre existing crack/damage and no metal shavings. ive done this to all ive used and had good luck.

test with air compressor to see if its opening at your set boost and install.

I also only use 1 boost comtroller now and thats a manual(hallman) set it and forget it. awesome quality.



and its hks ssqv ebay replica. not the legit one. it even comes with a hks badge but if you see a real deal youll know its fake.

clean and inspect.

this i actually boost leak tested to 35psi and no leak (i did this to check my whole system.)

not bad for cheap bov.


on that note i think chinese brand has gotten WAY better over the years and is gaining popularity.

I did a lot of reading and found the one that people have success with to save some headache and tried it my self.
so now I have parts for 600whp capable turbo, wastegate and bov for $400