My BP DOHC naturally asp. engine build

rxmx · Postby **rxmx** » Wed Oct 10, 2012 12:42 pm

150kw na, now that would be something special to drive

What sort of life do you get out of such a motor?

rascal · Postby **rascal** » Wed Oct 10, 2012 12:53 pm

NitroDann wrote:Can't be, I was told n/a builds are useless.
Dann

Spending too much time on mt.net.....

wozzah1975 · Postby **wozzah1975** » Wed Oct 10, 2012 1:21 pm

rxmx wrote:150kw na, now that would be something special to drive

What sort of life do you get out of such a motor?

I don't want to have anything major go wrong with it for at least another 2 years. Life span should be fine if I don't try and do anything silly with it. Even the dirty old Pinto lasted 5 years

Cheers
Woz

16bit · Postby **16bit** » Wed Oct 10, 2012 1:50 pm

would a build like this at 10:1 comp ratio with a supercharger @11psi work? or would the cams be too big?

wozzah1975 · Postby **wozzah1975** » Wed Oct 10, 2012 5:43 pm

NitroDann wrote:Looks like you are dropping around 20kw where the dip is, which is a lot even if you are making over 150rwkw. Does the wastegate arm move freely? Boost leak perhaps?

Dann

Yes Dann, it is alot and quite noticable, but by playing around with the ram tubes it proves it can be fixed with a little TLC and time. Looking at the previous dyno graphs it appears the dip is still there, it is just more noticable now because of the extra power up top. Either way it still has 100rwkw at the dip, and the next few outings are unlikely to see under 6300rpm anyway.

Need more time!

Cheers
Warren

wozzah1975 · Postby **wozzah1975** » Wed Oct 10, 2012 5:50 pm

16bit wrote:would a build like this at 10:1 comp ratio with a supercharger @11psi work? or would the cams be too big?

10:1 and 11psi, not on pump fuel, but with E85 absolutely (even 11:1)

I would go down in the cam size by around 2 profiles, less duration but similar lift.

To support the power you would need a decent size supercharger, MP90 or possibly larger to make it work properly.

Then you're are talking very serious power numbers. Not sure how the crank/block would cope with continual punishment.

Cheers
Woz

Postby **NitroDann** » Wed Oct 10, 2012 5:53 pm

SC14 and a 50% overdrive?

(300+whp, 400 at the crank?)

Dann

sailaholic · Postby **sailaholic** » Wed Oct 10, 2012 6:03 pm

Wouldn't 50 over drive mean it would top out way early and just end up making heat?

Sc14 is the Toyota ones of the mr2 correct?

Sent from my GT-I9100 using Tapatalk 2

Postby **NitroDann** » Wed Oct 10, 2012 6:16 pm

SC12 is from the MR2, the SC14 was from the 1GGZE, they also did a 1GTTE . (twin turbo, so yes its a big blower)

The SC12 is 1200cc and the SC14 is 1400cc, about 85 cubic inches.

You would need to drive it past 100% to make the power figures wozzah reckons can be made on these blowers (350whp+ on an extraordinarily efficient system).

Dann

16bit · Postby **16bit** » Wed Oct 10, 2012 7:50 pm

wozzah1975 wrote:
16bit wrote:would a build like this at 10:1 comp ratio with a supercharger @11psi work? or would the cams be too big?

10:1 and 11psi, not on pump fuel, but with E85 absolutely (even 11:1)

I would go down in the cam size by around 2 profiles, less duration but similar lift.

To support the power you would need a decent size supercharger, MP90 or possibly larger to make it work properly.

Then you're are talking very serious power numbers. Not sure how the crank/block would cope with continual punishment.

Cheers
Woz

i would use a c30 94 rotrex. people in the states have pushed 340whp.

food for thought.

Postby **NitroDann** » Wed Oct 10, 2012 10:03 pm

twincharged with a T88 for bottom end? :mrgreen:

16bit · Postby **16bit** » Thu Oct 11, 2012 8:03 am

good on you!!!

rxmx · Postby **rxmx** » Thu Oct 11, 2012 9:37 am

wozzah1975 wrote:
rxmx wrote:150kw na, now that would be something special to drive

What sort of life do you get out of such a motor?

I don't want to have anything major go wrong with it for at least another 2 years. Life span should be fine if I don't try and do anything silly with it. Even the dirty old Pinto lasted 5 years

Cheers
Woz

Nice, please get some in-car vids up if you ever get a chance

16bit · Postby **16bit** » Thu Oct 11, 2012 10:44 am

so for all the punters at home, whats the ballpark for an engine build like this?

wozzah1975 · Postby **wozzah1975** » Mon Oct 15, 2012 7:11 pm

rxmx wrote:
wozzah1975 wrote:
rxmx wrote:150kw na, now that would be something special to drive

What sort of life do you get out of such a motor?

I don't want to have anything major go wrong with it for at least another 2 years. Life span should be fine if I don't try and do anything silly with it. Even the dirty old Pinto lasted 5 years

Cheers
Woz

Nice, please get some in-car vids up if you ever get a chance

https://www.youtube.com/watch?v=IMjgj86 ... ature=plcp

There you go, one from the weekend. Try and ignore my rusty technique, notchy gearbox and lack of brakes.....

Cheers
Woz