Question F2 turbo crank

Stroker · 6-21-08, 6:45

I need to no how much HP can it handle and what is the highest RPM can it handle. An have you ever heard of some body that has broken one

**mx_masta** · 6-21-08, 8:59

Never heard of anyone breaking one. Never heard of anyone throwing a rod either.

So noone knows how much hp it can really handle.

The first things to go when chasing big numbers seem to be the headgasket or the piston ringlands.
Mostly due to a bad tune inducing ping / knock.

**chief tool** · 6-21-08, 17:47

one of the guys from NZ had a picture in a thread somewhere on this site with and FE3 stroker that threw a rod...

**SixSick6** · 6-21-08, 18:01

Uhhhh, nagatory. Look at it again anf you'll see SR20. The answer is 1,000 internets and +5 lolDongz for pict0rz.

**lundgren420** · 6-21-08, 18:36

The picyture was a KA20 and it was posted by Fredio54, FE3T said that he threw a rod at 412 hp on a stock 2.0 stroke. Although he may have been working on a stroker. Ask him.

Stroker · 6-21-08, 19:02

So iv built my engine its got all good stuff but cast crank if had every think done to the crank . I no its a stroker engine whats the limit should i rev it to and how much horse power do you think. i have spent a lot of money on this engine an the weakers link to me is the crank I have a R2 crank at home witch is a forged steel or cast steel different casting marks to the f2t crank i do want to rev the engine to 8k-85k what do you think. I do not want to break it but im after at least 500whp-550whp for now big turbo Gt51r

**mx_masta** · 6-21-08, 20:26

AFAIK yo are treading unknown territory revving an F2 crank that high, good luck!

**lundgren420** · 6-21-08, 20:28

Look at piston speed for the answer to that question. The piston speed at 6500prm's is roughly 4015 that is the max you want to see for sustainable time. The rev limit of FE3N with stock rods is 7000 and the F2T has a 6500 or 6750 revlimiter. I will stick by the F2T ands limit my self at 6500. The torque should be signifigantly higher with the extended stroke and this will also change the spool charicteristics of your turbo. Also look at Boostedrafi, his car club has a factory crank and factory rods putting down 585hp and like 485 tq. Proof enough for me that the crank is stout.

YouTube - Mecanica Galdo GLC 10.35 @ 139mph

**lundgren420** · 6-21-08, 20:42

The show stopper

Quote:

Originally Posted by Bo0sted_Rafi

Well guys, we went to the dyno tonight to confirm the last modify of our engine (Some NOS) and we get a great results. Last week we get the car to the dyno and we got 552whp with some problems. Tonight we get 584whp and 457 lbs of TQ.

I will post the track results this week because we gonna go this wednesday.Stay tunnned!!!

PD. Now we got WB too

**carcenomy** · 6-24-08, 17:34

I always thought the cause of failure was stress induced under the mass and momentum of rotating parts like the piston/rod assemblies and that the most common failure point on the FE-DOHC (stroked or not) in high speed applications was the bolts?

But I'm probably wrong.

Stroker · 6-25-08, 4:19

Quote:

Originally Posted by lundgren420

The show stopper

This engine is only 2.0 litre not 2.2

**lundgren420** · 6-25-08, 7:51

His new priject is though. There was a few guys with 2.2 strooker FE's but i dont know where they are now. So far it looks like Myself, Stroker, BoostedRafi, and i think LMB_ are stroking the FE. I cant wait till nex week, I am taking the whole week off and putting mine in. Then right after it starts it goes straight to the dyno for tunning and breakin proceedure.

**bakmans** · 6-25-08, 16:50

im working on one 2 with sr20det pistons. waiting on the scat rods but that might take a while before everybody paidup

**matt89glturbo** · 6-26-08, 21:04

The f2t cranks are pretty stout, i dont think overrevving will be the thing that takes one out. other things are going to fail first. I have already built an fe3 stroker and thrown a rod. So it can be done, my machine shop even said that the crank could have been used again. i have since rebuilt the stroker fe3, and ran it as a daily driver for a few months. I set the rev limit at 7k, when driving hard i usually only took it to 6500 though. i have taken it to the limiter, and it was able to get there with no problem, wouldnt say to do it all the time, and wouldnt really want to take it any higher either. I dropped the comp for a turbo, but so far have not put one on, still in the garage no time or money...it could still almost keep up with a stock f2t at 10psi (don't think the car was running at 100% when we raced though) and have had a couple prelude owners tell me my car would still outrun theirs (stock) so go fe3

as a side not the rev limit on the f2t and f2 n/a is 6200, not 6500...

6-21-08, 6:45	#1 (permalink)
Stroker Banned Join Date: Mar 2005 Location: Sydney, Australia Age: 34 iTrader: (0)	Question F2 turbo crank I need to no how much HP can it handle and what is the highest RPM can it handle. An have you ever heard of some body that has broken one

6-21-08, 8:59	#2 (permalink)
mx_masta Join Date: Dec 2006 Location: perth, Australia Age: 31 iTrader: (0)	Never heard of anyone breaking one. Never heard of anyone throwing a rod either. So noone knows how much hp it can really handle. The first things to go when chasing big numbers seem to be the headgasket or the piston ringlands. Mostly due to a bad tune inducing ping / knock.
	VF12 - VJ11 hybrid http://www.mx6.com/forums/1g-mx6-for...ic-inside.html 5 1/4" VDO splits in custom door trims http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 12" sub in custom boot/trunk http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 2.5" cat back, 18"x12"x3" FMIC.

6-21-08, 17:47	#3 (permalink)
chief tool Join Date: Feb 2006 Location: Sydney, Australia Age: 36 iTrader: (2)	one of the guys from NZ had a picture in a thread somewhere on this site with and FE3 stroker that threw a rod...
	84 626 sedan FE SOHC turbo (sleeper) 89 626 5 door F2T 90 323 sedan B6 SOHC Slug-o-matic DD, sold...too slow

6-21-08, 18:36	#5 (permalink)
lundgren420 Join Date: Oct 2005 Location: OZARK, MO, USA Age: 24 iTrader: (8)	The picyture was a KA20 and it was posted by Fredio54, FE3T said that he threw a rod at 412 hp on a stock 2.0 stroke. Although he may have been working on a stroker. Ask him.
	1988 MX6 N/A M/T -getting a new heart. Check it out http://www.mx6.com/forums/showthread...ferrerid=35300 1989 Probe GT M/T -my new toy 1980 Monte Carlo W/305 H.O.-my first ride and iv'e still got her

6-21-08, 20:26	#7 (permalink)
mx_masta Join Date: Dec 2006 Location: perth, Australia Age: 31 iTrader: (0)	AFAIK yo are treading unknown territory revving an F2 crank that high, good luck!
	VF12 - VJ11 hybrid http://www.mx6.com/forums/1g-mx6-for...ic-inside.html 5 1/4" VDO splits in custom door trims http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 12" sub in custom boot/trunk http://www.mx6.com/forums/1g-mx6-gen...cs-inside.html, 2.5" cat back, 18"x12"x3" FMIC.

6-21-08, 19:02	#6 (permalink)
Stroker Banned Join Date: Mar 2005 Location: Sydney, Australia Age: 34 iTrader: (0)	So iv built my engine its got all good stuff but cast crank if had every think done to the crank . I no its a stroker engine whats the limit should i rev it to and how much horse power do you think. i have spent a lot of money on this engine an the weakers link to me is the crank I have a R2 crank at home witch is a forged steel or cast steel different casting marks to the f2t crank i do want to rev the engine to 8k-85k what do you think. I do not want to break it but im after at least 500whp-550whp for now big turbo Gt51r

6-21-08, 20:28	#8 (permalink)
lundgren420 Join Date: Oct 2005 Location: OZARK, MO, USA Age: 24 iTrader: (8)	Look at piston speed for the answer to that question. The piston speed at 6500prm's is roughly 4015 that is the max you want to see for sustainable time. The rev limit of FE3N with stock rods is 7000 and the F2T has a 6500 or 6750 revlimiter. I will stick by the F2T ands limit my self at 6500. The torque should be signifigantly higher with the extended stroke and this will also change the spool charicteristics of your turbo. Also look at Boostedrafi, his car club has a factory crank and factory rods putting down 585hp and like 485 tq. Proof enough for me that the crank is stout. YouTube - Mecanica Galdo GLC 10.35 @ 139mph Last edited by lundgren420 : 6-21-08 at 20:32. Reason: added video
	1988 MX6 N/A M/T -getting a new heart. Check it out http://www.mx6.com/forums/showthread...ferrerid=35300 1989 Probe GT M/T -my new toy 1980 Monte Carlo W/305 H.O.-my first ride and iv'e still got her

6-24-08, 17:34	#10 (permalink)
carcenomy Join Date: Feb 2006 Location: Invercargill, New Zealand Age: 23 iTrader: (0)	I always thought the cause of failure was stress induced under the mass and momentum of rotating parts like the piston/rod assemblies and that the most common failure point on the FE-DOHC (stroked or not) in high speed applications was the bolts? But I'm probably wrong.
	Moderator - one who arbitrates Dictator - one ruling absolutely and often oppressively Contrary to popular belief, these are not the same things...

6-25-08, 7:51	#12 (permalink)
lundgren420 Join Date: Oct 2005 Location: OZARK, MO, USA Age: 24 iTrader: (8)	His new priject is though. There was a few guys with 2.2 strooker FE's but i dont know where they are now. So far it looks like Myself, Stroker, BoostedRafi, and i think LMB_ are stroking the FE. I cant wait till nex week, I am taking the whole week off and putting mine in. Then right after it starts it goes straight to the dyno for tunning and breakin proceedure.
	1988 MX6 N/A M/T -getting a new heart. Check it out http://www.mx6.com/forums/showthread...ferrerid=35300 1989 Probe GT M/T -my new toy 1980 Monte Carlo W/305 H.O.-my first ride and iv'e still got her

6-25-08, 16:50	#13 (permalink)
bakmans Join Date: Mar 2006 Location: uden, holland Age: 26 iTrader: (1)	im working on one 2 with sr20det pistons. waiting on the scat rods but that might take a while before everybody paidup

6-26-08, 21:04	#14 (permalink)
matt89glturbo Join Date: Mar 2002 Location: Utah iTrader: (0)	The f2t cranks are pretty stout, i dont think overrevving will be the thing that takes one out. other things are going to fail first. I have already built an fe3 stroker and thrown a rod. So it can be done, my machine shop even said that the crank could have been used again. i have since rebuilt the stroker fe3, and ran it as a daily driver for a few months. I set the rev limit at 7k, when driving hard i usually only took it to 6500 though. i have taken it to the limiter, and it was able to get there with no problem, wouldnt say to do it all the time, and wouldnt really want to take it any higher either. I dropped the comp for a turbo, but so far have not put one on, still in the garage no time or money...it could still almost keep up with a stock f2t at 10psi (don't think the car was running at 100% when we raced though) and have had a couple prelude owners tell me my car would still outrun theirs (stock) so go fe3 as a side not the rev limit on the f2t and f2 n/a is 6200, not 6500...