nonBB 50 trim to 35r????

[Robertm1212GST]

Alright guys im running a non BB PTE 50 trim and i wanna go bigger came across a great deal on a PTE DBB sc61 (bolt on gt35r) my mods are FMIC, FP 4" Intake, DSMlink, 850 Injectors, Crower 272's Cams, 3" exhaust, Walbro 255lph, Aeromotive afpr what are your guys thoughts on this turbo on a stock 2.0 motor with these mods?

 

[CanadianTSi]

Also all this talk about how weak the stock 7bolt is makes me laugh...

I ran 24psi on my 50 trim for 2 years with the stock studs and gasket. I've run 28psi on the 35R with no problems and a Friend of mine runs 32psi from his 3065 and recently layed down 450AWHP on a low reading Mustang Dyno, all on Stock 7bolts.

 

[No_Skillz]

Also all this talk about how weak the stock 7bolt is makes me laugh...

I ran 24psi on my 50 trim for 2 years with the stock studs and gasket. I've run 28psi on the 35R with no problems and a Friend of mine runs 32psi from his 3065 and recently layed down 450AWHP on a low reading Mustang Dyno, all on Stock 7bolts.

I'm running only 21psi on a PTE5031 at a VERY safe tune, boosted only 2x per tank of gas, and my headgasket is going.

 

[dsm-onster]

I couldn't keep a headgasket in my brothers old 7 bolt block, owned by another friend. But that was with new stock head bolts.

Do you mean stock head bolts or studs?

What I'm saying is the same as this. . . The 6-bolt has seen 62 lb/min from a sc61 but that doesn't mean they all will hold up. The chances of breaking a 7bolt at over 450whp is higher than a 6bolt. Much higher. I've seen the difference in the rod bolt diameter, rod thickness, and headbolt thickness. I've run them both. The 7bolt is still tougher than practically any other 4cylinder block out there. It's limit is not defined by one user's results. Nothing is. Curt Brown made 500whp with c16 and the evo3 16g, too.

If the 7 bolt rods don't bend at lower horsepower than the 6 bolt rods then Mitsu would have been smart to still use the much larger 6bolt rod bolts. The 7bolt rods are physically lighter than the 6 bolt rods and the large 6-bolt rods would then see less tensil force on them during high rpms. It would be a nice high rpm block.

EDIT: now, the 7-bolt has a real crank girdle. This is a BIG plus especially for a stroker 7-bolt or a 7bolt 4g64. But noone really worries about jumproping a crank until after either stock rod would be bent or unless you're revving a stroker rather high which likely will have forged internals by that stage, too.

 

[Robertm1212GST]

Alright well looks like i have to stay with the 50 trim anyways transmissions is going out in the car so its time to pull her and send it off the shep Thanks for all the info guys.

 

[gsxrtalon]

Thank you Tyler.

When I state "completely stock" I mean stock bottom end and head. Yes, stock studs/bolts, HG. If one would check my profile and noticed my mod list that would state it. I did not post in this thread to start the "how much can a stock bottom end hold" debate. I am simply saying that I am currently running 20psi at right around 38lbs/min on e85 with peak timing of 17* and an a/f ratio of mid 11's and my IDCs are 60%.

Everyones motor is completely different.

There are tons of examples on the dsmlink boards of guys running 400+hp in excess of 25 psi on the stock bottom/head with dyno sheets to prove it.

Just do a quick search on here. "stock bottom end" and read.

 

[CanadianTSi]

The chances of breaking a 7bolt at over 450whp is higher than a 6bolt. Much higher.

I totally agree. I'm just saying most people don't give the 7bolt enough credit

 

[dsm-onster]

Thank you Tyler.

When I state "completely stock" I mean stock bottom end and head. Yes, stock studs/bolts, HG. If one would check my profile and noticed my mod list that would state it. I did not post in this thread to start the "how much can a stock bottom end hold" debate. I am simply saying that I am currently running 20psi at right around 38lbs/min on e85 with peak timing of 17* and an a/f ratio of mid 11's and my IDCs are 60%.

Everyones motor is completely different.

There are tons of examples on the dsmlink boards of guys running 400+hp in excess of 25 psi on the stock bottom/head with dyno sheets to prove it.

Just do a quick search on here. "stock bottom end" and read.

Ok that clears things up. Thanks. Your post was a little deceptive.

Absolutely, Tyler. The 7bolt is not given enough credit. 400whp on a daily driven 7bolt is the norm and is VERY lofty considering what other 4bangers can tolerate.

6-bolts have about a 100hp difference in durability. But that doesn't negate the beauty of the dsm 7bolt platform. That just mkes it cheap to upgrade it later. Either motor is far stronger than almost all other brands.

 

[gsxrtalon]

Good to clear that up and I'm 6bolt...not 7bolt also.

I know the more I up boost the greater the risk of breaking something is but like I said I want to build the bottom end/head anyways so why not find the limits of MY 6bolt and see if I can't make some magical numbers on the stock block.....or we will see how much stuff I can destroy Either way I'm having fun

Tyler power to the 7b0lt. I know paul (99gst_racer) swears by his 7bolt

 

[dsm-onster]

and he doesn't even have a 7 bolt anymore.

 

[gsxrtalon]

I just talked to him the other day and hey said his motor threw a bearing or something. It can happen to anyone I guess

 

[dsm-onster]

Yes. I was just remarking that a 6 bolt is less likely to blow versus a 7 bolt... in stock form.