Quote:
Originally Posted by BAD300
Hey Roman,
Could you please let me know what rpm you ran on the dyno for the 2 engines in your 1st post, to get the hp you have stated for each?
650hp with 1000cc injectors = ?rpm
550hp with 680cc injectors = ?rpm
P.S. although my build is totally different than yours Roman, using LPG & auto trans but would still like to know a safe rpm range for dyno tuning the M103 engine?
I want to see how car goes @ 15psi (1 bar) with GT3540R .63 A/R. May change up to .84 A/R if I'm not happy with performance (but severely doubt it  )
What do you suggest would be the most efficient/effective rpm limit to push the M103 at say 10psi; 15psi or 20psi? At what rpm does powerband start to level off? I know you've pushed your engine way over redline but is this necessary?
Appreciate your reply mate 
Tim  |
Hi!
You can only compare my RPM and only if you run with twinentry manifold and twinscroll turbinhousings otherwise it will be very different results.
My first setup
TB60 turbocharger
60mm inducer
0.84 turbinhosing T3 twinentry manifold
570Hp at 5400rpm and 1.7bar
Sesond setup
GT45 Turbo
70mm inducer
1.05 turbin with T4 twinentry manifold
650hp at 6500RPM and only 1.5bar
less boost and more power. Means that bigger turbocharger more effective and the curve is softer and less lag
We stil have one car with the same setup like my first setup and it has faster spoolup then my car but you feel when you lose power after 5500-5800rpm so I would never run smaller turbocharger then TB60 with 0.84housing.
My daily driver car is 300ce-24v and it is the same setup like my blue car with GT45 and i run only 1bar and i just love the effect curve. revlimit at 8000rpm
Daniels 300ce12v (TB60) revlimit at 7000rpm
Petros 300ce 12v (TB70) revlimit at 8000rpm
Rasmus c36 (gt45) revlimit at 7000rpm
All cars has auto trannys and LSD diff
I think it is difficult to compare our cars becaurse we use only special twin entry manifolds, SA EFI and mostly run E85 Ethanol
About GT35 and 0.63 housing and you will probably get backpressure becaurse turbin is too small for so big engine.
We got pretty much backpressure by using GT35 on BMW 325 by running 1.3 bar
And it is pointless to spend your money on ball bearing GT35R. You not going to feel any different by using ball bearing turbocharger on big inline 6 engine.
We allready tested it too