42 replies to this topic

[oakmere]

Apologies for raising a thicko question, but what benefits would there be (if any) in running a harrop over an M62 on an engine with stock internals?

  a stock z22se would need to have a reduced rev limit to prevent the conrods from failing, they simply cannot take over 270bhp for very long.    ps: an upgraded engine (stronger rods and pistons) should see a decent jump in bhp with a Harrop

You could try running it with a very large pulley. This should give low heat build up and less power loss driving the charger. I mentioned this to John at CS once and he said it would be interesting to see the results. Makes no economic sense though.

[ufods]

 

 

Apologies for raising a thicko question, but what benefits would there be (if any) in running a harrop over an M62 on an engine with stock internals?

  a stock z22se would need to have a reduced rev limit to prevent the conrods from failing, they simply cannot take over 270bhp for very long.    ps: an upgraded engine (stronger rods and pistons) should see a decent jump in bhp with a Harrop

You could try running it with a very large pulley. This should give low heat build up and less power loss driving the charger. I mentioned this to John at CS once and he said it would be interesting to see the results. Makes no economic sense though.

 

 

 

.....i believe this will result in bad torque and response in low rpm as the tvs then also running low rpm. the m62 will do better this job.

[oakmere]

Fair play. Never got as far as looking at the charger pressure maps.

[leevx2.2]

Anybody ?

[leevx2.2]

£1100 Ono

[Exmantaa]

That's cheap!

Put it on Martin's engine. He will buy after he has experienced the 330+HP...

[leevx2.2]

Are his pistons and rods good for it ? if they are convince him to buy it lol 

[CHILL Gone DUTCH]

We mapped a standard internal b207 to 350 hp but stopped as we didn't know what the limits of these engines are Probably best to ask a few of the Dutch lads as they have quite a few 2.0 b207 with standard internals on harrop There's also a list here http://www.vx220.org...ersions/page-47 Or maybe fezz ( tom ) might be intrested

[vocky]

As a guide; according to the GM build book LSJ rods are good for 400 bhp, but the LSJ pistons are only good for 300 bhp

 

That said, I'm sure they might happily run for a while above those figures, however engine life span would be reduced.

 

 

 

 

[smiley]

The US has been running stock lsj's near 400 for quite some time now.

What the exact impact is on the stock B207R is the big question.

 

When i polled the saab community, most do not go beyond the highest turbo mapping stage of 310bhp and 400nm.

Those who go above have upgraded rods and pistons. (but only because saab tuner tells them to. None seemed to like to do trial and error.)

 

So where are we now:

1. Ultimate had issues when his stock B207R was around 350. (large oil consumption) 2. Martin had issues. But so many it's difficult to pinpoint it to one cause.

3. Both me and Speedster4fun ran the stock B207R with around 330 for a year.

4. This winter Speedster4fun has upped the ignition to 364 bhp.

 

We all (accept Martin) have flowed heads on the B207R though. With stock i am only referring to oem rods and pistons.

Edited by smiley, 17 November 2016 - 11:55 AM.

[CHILL Gone DUTCH]

Is speedsterforfun rob, Stefan

[vocky]

The US has been running stock lsj's near 400 for quite some time now.

What the exact impact is on the stock B207R is the big question.

 

When i polled the saab community, most do not go beyond the highest turbo mapping stage of 310bhp and 400nm.

Those who go above have upgraded rods and pistons. (but only because saab tuner tells them to. None seemed to like to do trial and error.)

 

So where are we now:

1. Ultimate had issues when his stock B207R was around 350. (large oil consumption) 2. Martin had issues. But so many it's difficult to pinpoint it to one cause.

3. Both me and Speedster4fun ran the stock B207R with around 330 for a year.

4. This winter Speedster4fun has upped the ignition to 364 bhp.

 

We all (accept Martin) have flowed heads on the B207R though. With stock i am only referring to oem rods and pistons.

 

US rolling roads seem to give a higher figure than UK rolling roads.

 

Martin has a ported head, comp cams, dbilas valve springs.  

[smiley]

Is speedsterforfun rob, Stefan

 

yes.

[leevx2.2]

i was thinking with a big pulley martin could run more power with less heat etc than the m62 

[vocky]

that should work, 330 bhp seems to be proven by Smiley and Stefen

[leevx2.2]

sounds good 330 bhp Martin where are you lol

[Alastair]

i keep looking at this and trying to justify it...  I just need, rods, pistons, 3" exhaust and some dutch software!  If only i wasn't short of cash for my house extension!   

[smiley]

that should work, 330 bhp seems to be proven by Smiley and Stefen

 

Same person  

[Exmantaa]

The US 2.0 LSJ block shares the same pistons and rods as the B207. (lhe later 2011 type B207 blocks have a different 8 counterweight crakshaft)

My LSJ dynoed 354 on a Maha dyno on the 80mm pulley. (All Dutch Harrops are on the 80mm pulley)

Rob/Speedster4fun now is on the same powerlevel after some inition tuning.

[CHILL Gone DUTCH]

Good to see the 2.0 litre engines pulling so well Have you and rob stopped now frank ?