Turbocharging L36 or Twincharging L67?

[supercharge33]

Okay well I know first off the L67 can handle boost better due to the stronger internals and lower compression ratio, but at the same time the L36 has a higher compression ratio which if tuned properly / ran correct octane gas, and could avoid detonation you would be able to create more horsepower with a higher compression ratio with forced induction because the piston is up higher compressing the air even more that's already extremely pressurized/condensed.

However anyways besides the L67 having stronger internals, lets say you put the SAME EXACT turbo kit, run the same psi & same tuning software on #1. Supercharged L67 (which makes it twin charged then) OR #2. L36. Is naturally aspirated, HOWEVER has a higher compression ratio (which if detonation can be avoided will create quite a bit more horsepower), also has NO parasitic loss from driving the supercharger, has a lower final drive ratio then the L67 final drive ratios (so acceleration is improved),

So what will create more horsepower, and not only that since the final drive ratios which would probably be faster accelerating w/ identical turbo setup; and what will be the difference in horsepower & torque curves/peaks (low/mid/high range power for each motor by guesstimating) reason i'm asking this is I heard twin charging you get great down low from the Eaton M90 Charger power/torque while your turbo starts to spool completely. Also would putting on a smaller s/c pulley increase power, and would you benefit a lot from some kind of inter-cooler setup with the twin-charged setup?

Thanks Guys (also this is my first post & happy to join your forum BTW!)

~Andy

[tod1d]

twin charging produces the most amount of power, but then the weak transmission will grenade on you, I have a buddy that had that setup and now his car is parted out because the tranny cost too much to rebuild for the third time

[redlinepontiac]

short answer....single turbo on either motor, l36 then tune has to be spot on.

[matt5112]

Turbo guys run L26's now simply because they're cheap.

So when they grenade its less expensive to get the vehicle up and running again.

[Z34Phoenix]

your reasoning is good, but when its much harder for it to be applied.

high compression and boost is a good combo when you want more power off boost and arent planing to run lots of PSI. (Daily driver) Low compression is good for when you want lots of power and dont care about power off boost. (track)

twin charge presents and issue of having two diff chargers to cool. the Turbo is easier to cool due to the ability to run a front mount IC. but by still having the SC you have to use an Air to Water


ok lets get to basics here... are we talking ground up build? or are you looking for a GT or GTP to put a turbo on? if your going for the power level it sounds like, either way you will need a purpos built trany. with that trany you can get what ever gear ratio you want. so that is out of the equation. now for which block can handle the most boost stock? i would say bypass the l36/67 and look at the l26/32's of those i would go with the l26 since it has an AL upper intake and will handle the heat and boost better then the plastic l36. twin charging is NEAT. but IMO not worth setting out to build unless you already have the SC on the car and are ready for tuning and other issues.