sr20det 87mm pistons safe boost?

[Volcom887]

i was thinking about running 18-20 pounds of boost on my sr

just bought cp pistons and eagle rods for it and my head is built im running a s15 turbo

has anyone had issues about throwing a rod on a non sleeved s13sr20

on 20 pounds my buddy was tellin me to not run 20 cuz ill throw a rod but any imput from anyone???

[EsChassisLove]

You won't throw an eagle rod with an S15 turbo. Those rods are rated for 700+, you won't hit half of that. You're buddy is a bit stupid.

However if it isn't built properly you can spin a bearing. And if it isn't tuned right and you get nasty enough detonation, you MIGHT be able to throw a rod. Still doubtful.

[stilmissmysti]

I ran 18lbs on my daily for over a year on stock rods you won't throw an eagle... You also will be beyond the turbo's capacity at 20

[ForeignMuscle]

Santos, a member here, is pushing 34lbs of boost with a Precision6262, factory block, and eagle rods. A s15 turbo wouldn't push enough boost to hurt factory internals with a proper tune. People often under estimate these engines. I know of several people pushing 500whp on factory internals. I don't recommend it, but the point is, your engine can handle a lot. It's ALL in the tune.

[fliprayzin240sx]

No need to push 20 psi on an S15 turbo...it runs out of juice at around 15-16 psi. No point of making it push that high when its out of efficiency.

As far as your bottom end, I was running unsleeved 87mm Greddy Pistons with stock compression with Eagle Rods...had no problem running a GT3582R on it and making over 500hp.

[Volcom887]

I'm liking what I'm hearing.... ya I wana upgrade my turbo maybe a gt30 or somethin like that.. but ya thanks for he info .... ya he told me I ould throw a rod out thedblock cuz the block wouldn't b strong enough. I kinda had a feeling he was full of shit

[fliprayzin240sx]

You should go punch him in the face for us, then get new friends....he drives a civic doesnt he?

[Volcom887]

Ahahaha no but I guess u couls da he's more a aquantince than a friend... but ya definatly deserves a punch

[Matman03]

Just my 2 cents...I ran 20 psi on a DD for 3 years stock rods, stock pistons, just a thicker headgasket and headstuds. GT3071r Turbo. Then as you guys probably know, I am in the middle of a rebuild because the cometic headgasket blew out and ruined the block. Also had to replace the bearings. So lesson to be learned is that without a great tune and some better parts in the bottom end, you do not want to push your stuff beyond its limits.

[cotbu]

whom or what, is the setter of limits?

[fliprayzin240sx]

Just my 2 cents...I ran 20 psi on a DD for 3 years stock rods, stock pistons, just a thicker headgasket and headstuds. GT3071r Turbo. Then as you guys probably know, I am in the middle of a rebuild because the cometic headgasket blew out and ruined the block. Also had to replace the bearings. So lesson to be learned is that without a great tune and some better parts in the bottom end, you do not want to push your stuff beyond its limits.

I still say tune...I've had friends push over 460 to the wheels with a TD06-25G on fully stock bottom end. Beat the living crap out of the car with no hiccups for over 3 years till he had to leave Japan. Plus, Cometic HG is shit. I'd rather run fresh stock HG with ARP studs over that crap.

[Volcom887]

I was running a stock sr on a 18g turbo. On 25 pounds of boost for a year tuned great and it lasted me a year thn spun a bearring cuz I oil starved it ...something dented the oil pan and messed up the pickup. But that's the only reason it blew but I'm knowlageable with the underestimanted sr but I never bored so it was just a question :)

[Matman03]

cotbu, only you set the limits, just saying some parts can only go so far...

[S14 Cobra]

Nice info people!

[STR8E180]

bore size as nothing to do with throwing a rod
i recommend u stop listening to your buddy

[STR8E180]

Santos, a member here, is pushing 34lbs of boost with a Precision6262, factory block, and eagle rods. A s15 turbo wouldn't push enough boost to hurt factory internals with a proper tune. People often under estimate these engines. I know of several people pushing 500whp on factory internals. I don't recommend it, but the point is, your engine can handle a lot. It's ALL in the tune.

check this out

completely standard bottom end
standard inlet manifold

internal work
brain crower 272 intake and exhaust cams
brain crower valve spring and retainer kit
rocker arm stoppers

precision 5557 .63 exhaust housing
powertune exhaust manifold
tial MVS external gate
i.d 2000cc injectors
E85
haltech platinum pro

11.0 @ 122 and missed 4th gear!!!! 1.4 60ft

http://i53.tinypic.com/rlexjs.jpg

this engine held together with out any issues
the only problem it had was keeping the head bolted onto the block
at roughly 35psi the cylinder head started to lift of the block and blow the head gasket
standard head bolts start to stretch at 35psi

[STR8E180]

he told me I ould throw a rod out thedblock cuz the block wouldn't b strong enough. I kinda had a feeling he was full of shit

sorry to say this about your friend but his a f***ing idiot
bore size has nothing to do with throwing a rod

[Kingtal0n]

I would never push an oem redtop beyond 320rwhp if I wanted to drive it every single day without issues.

Now, If this was a second vehicle, I would have another block standing by of course, but the sr20det should perform at 400, even 420~rwhp without throwing an oem rod, and I would expect at least 50k miles of abuse before it spit a rod bearing. 11:1 air fuel and 9* of timing btdc please, thanks.

[fliprayzin240sx]

check this out

completely standard bottom end
standard inlet manifold

internal work
brain crower 272 intake and exhaust cams
brain crower valve spring and retainer kit
rocker arm stoppers

precision 5557 .63 exhaust housing
powertune exhaust manifold
tial MVS external gate
i.d 2000cc injectors
E85
haltech platinum pro

11.0 @ 122 and missed 4th gear!!!! 1.4 60ft

http://i53.tinypic.com/rlexjs.jpg

this engine held together with out any issues
the only problem it had was keeping the head bolted onto the block
at roughly 35psi the cylinder head started to lift of the block and blow the head gasket
standard head bolts start to stretch at 35psi

Did you guys figured out how to resolve the lifting head issue? Most folks in Japan would machine the block to take larger 12mm head bolts over the OEM sized 10mm bolts. Some of the big HP guys I knew out there went with this mod and never had an issue again. One of them just stuffed the 650whp damn engine into a miata.

[STR8E180]

Did you guys figured out how to resolve the lifting head issue? Most folks in Japan would machine the block to take larger 12mm head bolts over the OEM sized 10mm bolts. Some of the big HP guys I knew out there went with this mod and never had an issue again. One of them just stuffed the 650whp damn engine into a miata.

Keep in mind The cylinder head was never removed of the block so it still had standard head gasket and head bolts
As soon as we upgraded to ARP GTi stud and nut setup with 16mm inserts in the block to get more clamping force down on the cylinder head it solved the problem
We don't like the normal normal ARP stud and nut setup for sr20's they don't bottom out
We normally use the GTiR 16mm items or the ARP Mazworx item

I'm using GTiR ARP head stud and nut setup with 16mm inserts in the block in my sr20vet and I'm runnin 44psi making 750hp at the rears and I havent got any issues with cylinder head lifting