strength of the NA DOHC 6G72

[gear_grinder]

hi, i read through "bob the greats" turbo write up and found it to be awsome! but i was wondering how much boost the NA engine can hold up to, and what power numbers are expected? does anyone know?

I am actualy getting info for a friend, his 3kgt is DOHC NA (obviously) and is willing to swap in a turbo motor, but would like to keep the stock engine and turbo if posible. he doesnt know much about how turbos work, so i am going to become his technical advisor sence i already have a grasp on the turbos from doing alot of turbo work on my RX-7. were working on his car to be a fast summer daily, so we're going through and doin all the preventive matinance first (timing belt, head gaskit, etc..) and turboing the motor when we pull it for the head gaskits if he ends up keeping the motor.

The engine goodie list is as follows: turbo manifolds and stock DSM turbos (13g or 14b), oil filter sandwich for turbo oil supply and oil cooler, BIG oil cooler, y down pipe, custom FMIC system, HKS SSQV, Apexi NEO AFC, turbo computer and wire fabrication, full straight through exhaust (we live in BFE so emmissions are no issue), cam gears set retarted (prevent detonation), 460cc high imp injectors, walbro 225 fuel pump, and adjustible Fuel presure regulator. Other than the other little fabrication things to make it all work (wiring in second O2 sensor ,etc...) that should be it motor wise.

if anyone had good information and input please let me know. thank you.

O, i forgot in the EBC in the engine list, along with supporting gauges to monitor the engine at all times.

[Jomojr]

Good luck with your project! The following thread will be your friend, all the info you are looking for is discussed at length here http://www.3si.org/forum/forumdisplay.php?f=53

Get to know the gang in that thread, many of them have already been down the TT conversion road. Keep us posted on the progress as well

[Mr.3000]

wrong link there bro. I think he is referring to this link:

the TT conversion link thread

[Jomojr]

Heh actually I totally forgot about that thread Thanks for pointing em in the right direction.

[Mr.3000]

lol no prob man how's the car running?

[Jomojr]

I broke the tranny again 8( This time it was the diff. Just letting her sit till I can get it fixed right and put a quaife in there instead of the old insert. Go figure I put on DR650 snails, new tires, and the diiff broke lol

[green-lantern]

Originally Posted by Mr.3000

wrong link there bro. I think he is referring to this link:

the TT conversion link thread

that's an awesome link! I like to +rep that guy a lot and every one else that is in it.

btw Mr 3000 where you running a TT tranny or are you going to because if so I need to talk to you. some one has made me an offer I cant refuse.

[raven1231]

Originally Posted by gear_grinder

hi, i read through "bob the greats" turbo write up and found it to be awsome! but i was wondering how much boost the NA engine can hold up to, and what power numbers are expected? does anyone know?

I am actualy getting info for a friend, his 3kgt is DOHC NA (obviously) and is willing to swap in a turbo motor, but would like to keep the stock engine and turbo if posible. he doesnt know much about how turbos work, so i am going to become his technical advisor sence i already have a grasp on the turbos from doing alot of turbo work on my RX-7. were working on his car to be a fast summer daily, so we're going through and doin all the preventive matinance first (timing belt, head gaskit, etc..) and turboing the motor when we pull it for the head gaskits if he ends up keeping the motor.

The engine goodie list is as follows: turbo manifolds and stock DSM turbos (13g or 14b), oil filter sandwich for turbo oil supply and oil cooler, BIG oil cooler, y down pipe, custom FMIC system, HKS SSQV, Apexi NEO AFC, turbo computer and wire fabrication, full straight through exhaust (we live in BFE so emmissions are no issue), cam gears set retarted (prevent detonation), 460cc high imp injectors, walbro 225 fuel pump, and adjustible Fuel presure regulator. Other than the other little fabrication things to make it all work (wiring in second O2 sensor ,etc...) that should be it motor wise.

if anyone had good information and input please let me know. thank you.

O, i forgot in the EBC in the engine list, along with supporting gauges to monitor the engine at all times.

12-14psi with stock internals with supporting mods though running 93/94 octane

[gear_grinder]

12-14lbs is good boost numbers with the bigger 13g/14b turbos on 10:1 comp pistons, anyone with power numbers?

[raven1231]

Originally Posted by gear_grinder

12-14lbs is good boost numbers with the bigger 13g/14b turbos on 10:1 comp pistons, anyone with power numbers?

im currently at 9psi running 384fwhp/454crnk