[german tarquini]

which parts to use forged for a horsepower of 700 or 730 in the wheel
my car already has lt4 fuel system,jms,ecs supercharger with 6.4psi at 5500rpm and 9.5 at 6400..93 fuel
with a power between 590 to 620 depending on temperatures... afr from 11.9 to 12 approximately.
with pistons only enough? If not, what set of connecting rods and pistons do you recommend, without having to balance, make it a replacement with OEM measurements
gpi have no pistons available for 2-3 months
thank you

[Joshinator99]

Originally Posted by german tarquini

which parts to use forged for a horsepower of 700 or 730 in the wheel
my car already has lt4 fuel system,jms,ecs supercharger with 6.4psi at 5500rpm and 9.5 at 6400..93 fuel
with a power between 590 to 620 depending on temperatures... afr from 11.9 to 12 approximately.
with pistons only enough? If not, what set of connecting rods and pistons do you recommend, without having to balance, make it a replacement with OEM measurements
gpi have no pistons available for 2-3 months
thank you

The GPI drop-in kit rocks but sounds like availability is an issue these days. You may want to bite the bullet and just get in line for the GPI kit. Not sure who else makes a drop-in kit? If you’re staying in 93 fuel then make sure you drop the compression.

[german tarquini]

I will be placing a flexible fuel sensor these days... e40 is my thought
when lowering compression how many lost hp? How many psi to add to balance the power... what to take into account with the melody?
I found this set
https://www.modernmusclextreme.com/p...px#productTab1
thank you

[german tarquini]

What direct replacement low compression forged pistons with oem connecting rods do you recommend?
thank you

[Joshinator99]

Originally Posted by german tarquini

What direct replacement low compression forged pistons with oem connecting rods do you recommend?
thank you

I recommend NOT using OEM rods. Most drop in kits balance the new pistons and rod assemblies to match the old OEM bob weights. So the new rods will be much stronger than OEM.

[Joshinator99]

Originally Posted by german tarquini

I will be placing a flexible fuel sensor these days... e40 is my thought
when lowering compression how many lost hp? How many psi to add to balance the power... what to take into account with the melody?
I found this set
https://www.modernmusclextreme.com/p...px#productTab1
thank you

Wow, that actually looks like a really nice kit!

E40 is ok. If you could run E60+ all the time then I’d say you could stay stock compression but if you’re going to run 93 on occasion you’re better off dropping the compression. It’s not a big difference in power and very easy to make up with just a bit more airflow from the blower.

[german tarquini]

thank you joseinator99

I have pulleys for 12psi.. the low compression pistons will be able to handle it on 93 fuel
What about doing strips of more than a mile? with internal parts forged? they would resist?

[KingLT1]

TSP and Vengeance racing also offer drop-in kits. I agree with Josh to drop compression if you want to run 93 octane. You might consider balancing the rotating assembly especially if you plan on doing mile or road course events. Pray Performance has a video on it. After I seen this video it has me second guessing just dropping rods/pistons in my engine. I know some haven't had any issues, just like I have been pumping 10psi thorugh my SBE for 4+ years with no issue. But these LT1's seem to be a crap shoot.

8min in video it's discussed.

[german tarquini]

very good advice

thanks