haha, i'm not suprised... **** happens man! you'll get it

 

We coulden't go higher in rpm becuse the wastegate was to small so we decide to change it to a 60mm. Next time we go to the dyno with this engine we expect 700++++

 

i say 430 cause u'll run into an "issue". i bet once everything is worked out u see 490 @20psi.

 

70mm comp will not tell you much about hp. don't tell us story's show your dyno report

I still say 430 max! if ever....

good luck!

REgadrs
Iwan

 

i made 461 at the wheels with my t78 and a small street port at around 22 psi (fluctuated between 20 and 26 psi, gotta get that fluctuation fixed) i dont see you having any problem eclipsing 460 with a steady 20 psi and a monster street port. I would actually say more like 480-490 is what your gonna make.

 

Hello all single turbo fans! I finally dynoe'd the REW 13B motor! Place DTE Racing at Katrineholm 140 km from Stockholm. Superflow 901 calibrated, flywhheel hp A/F reading. EGT, intake temparute and so on. Result 457 hp@7300 rpm@ 20 psi boost. Dissapointed!! I was looking for 500 hp@20 psi boost but went into some ignitions issue with the Micro-Tech ignition box. Dialed in 16 deg Leading@3000 rpm and only 2 deg less ignition@7000 rpm@20 psi boost. But... the motor knocked and one apex only have 2 bar or 3 psi cranc pressure, bad luck as this was with with Shell V-Power 99 octane unleaded fuel with 2% Castrol TTS 2- stroke oil mixed. I'm confused! At 6500 rpm the knock occured and the disaster was a fact. Everything went fine with the fuel mapping which took us abot 3 hours to done with a great power curve with no dips. But the ignition was as i see it a mess. A little fluctating and the strobe lamp weren't flashing when we raised the rpm from 3000 to 6000 rpm first at 6000 rpm the flash was lighted again. What's happening? I think we could have made close to 500 hp if we only had some more tuning time with no ignition issues. The plan now is to get the bugs sorted out and wen't for the 3rd dyno run in April. I also consider having Jon Blanch flying up to Sweden and help us with our problems! As i see it i'm not satisfied until i reach 500 hp@20 psi boost. Only time will tell!

/Lasse

 

Lady's and Gentleman's

look at my first calc about the power figures. Well I would say, I won this time ^^ I assume the 457 hp are at the flywheel.

however, sorry to hear about the problems with ignition! You should check your seals as them can brake just where the corner is, but the broken peaces may be to big to fly away and them will be still in Rotor but them will cause compression loss. 14° advanced at 20 PSI is to much for 99 octane, you should be fine with something like 8 or 10 deg. I made very bad experience with Shell V-Power, which is rated 100 octane here in Germany. Butter results were made with 98 octane.

REgards
Iwan

 

Thank's ivan for the input! I had 16 deg at 18 psi boost and 14 deg at 20 psi and 7000 rpm. i have run 18 deg on 15 psi and 98 unleaded on a 1977 stretport motor for 6 years ago vith distributor, no problem (only made 380 hp)I will take the motor apart next week and inspect it. Then come to a conclusion what to upgrade, think it will be the apex seals and side seals. But first i work out the timing bugs with Micro-Tech. The hp is at the flywheel corrected to SAE standard.

 

I hope you're referring to classification of sensors. 2 bar of positive pressure is 29 psi.

 

is that flywheel hp or rwhp? If that is flywheel then yes iwan was right but I don't know how the hell that hp is so low for such a big turbo.

 

I made 512rwhp with a T88, 1/2 bridge, and ~21-22psi, so i'm going to say you are going to make about 468 rwhp on the T78 and 20 psi.

 

Engine dynos are a tad more accurate than the ego machines(chassis units)

 

as I said earlier...the dynos in the us and the dynos in europe give vastly different readings for very similiar setups.....must be due to atmospheric pressures of something like that???

When i see some of the figures that you guys are quoting for certain setups...i'm like whoa...are you sure you got that rwhp figure???...........something's happening somewhere?


Anyone care to attempt to clear up this mystery?....or at least enlighten us