gazzol
Well-Known Member
I'll just leave this here
Individual Throttle Bodies, 6 Cylinders and 7000 RPM
- Thread starter gazzol
- Start date
Mmm, music!
What did the dyno show?
What did the dyno show?
Harmonious!
gazzol
Well-Known Member
Not as much as I would have liked but it is a road car and pulls like a train from idle. 225bhp @6400 rpm.
What a beautiful sound... there is nothing quite like a naturally aspirated engine at full song. ITBs, or individual venturi carburetors in symphony with the exhaust note... love all of it.
Well done. 225 at the wheel is nothing to sneeze at. What was your torque number?
Perhaps I should put ITBs on the M30 in my e28?
Ed Z
Well done. 225 at the wheel is nothing to sneeze at. What was your torque number?
Perhaps I should put ITBs on the M30 in my e28?
Ed Z
184.6?
Perhaps you've already listed this elsewhere, but how was the engine built up? Just curious... Different cam? Pistons?
Thanks,
Ed
Pretty cool!
Yes, Ed, ITBs on the E28. My M5 has 6 hungry mouths to feed!
Yes, Ed, ITBs on the E28. My M5 has 6 hungry mouths to feed!
Ok... it's heading a bit off topic, but still talking about M30s here.
Mine is only a simple M30 and not the fearsome twin cam M. I think the reality of adding real power would involve a modern turbocharger...but the ITBs would sound so good. That's why I ask about the internal mods on Gazzol's car. My stock M30 was rated at about 182hp and 214ft/lbs at the crank. Getting 225hpat the wheel would be a marked improvement, adding a bunch of torque would be better in a real-world street car. Obviously, this is a well-worn conversation over on mye28.com, but it's nice to get another perspective.
edit... I notice that I didn't quote Gazzol directly, but I'll wait for his response.
edit, edit... Interesting strut brace, Gazzol. I don't think I've seen that one.
Honolulu
Well-Known Member
Interesting to see how much the engine rotates at the end, when Leadfoot lets off the gas. Imagine the engine squirming around in there while on a road course.
gazzol
Well-Known Member
Power was 225 bhp corrected at the flywheel NOT the wheels. If it were at the wheels I'd have been doing backflips as that would have been 280 ish at the flywheel.What a beautiful sound... there is nothing quite like a naturally aspirated engine at full song. ITBs, or individual venturi hicarburetors in symphony with the exhaust note... love all of it.
Well done. 225 at the wheel is nothing to sneeze at. What was your torque number?
Perhaps I should put ITBs on the M30 in my e28?
Ed Z
It is important to realise that whilst this may seem like a low figure that this is a street car that only looks like a track car and the engine was built with small ports and small throttle bodies to keep the gas velocity up to help with torque which it has in abundance. Also the cam is "only" 290 degrees which is tame ish as Alpina used a 300 degree cam in their road cars. In addition the lobe angle of the cam is quite wide at 113 degrees, this also helps torque but at the expense of top end power.
The torque figure is 201.7 lbft peak but that is only part of the story. At 2000rpm the engine produces 150lbft and at 7000 rpm it is STILL making 165 lbft. It doesn't make a lot of power but this is still a very quick car.
The build spec was listed here
https://www.e9coupe.com/forum/threads/new-engine.34541/#post-287882
gazzol
Well-Known Member
Here is the dyno plot for those interested.
Excellent! Thanks for directing me to your build thread. That is a nice, flat torque curve. Torque is king on the street. I know you are going to love this engine... the sound is exquisite.
Ed Z
Very similar to a b35 with a street cam as well.
James Poulter
Active Member
gazzol
Well-Known Member
Those look real sexy, what engine are you fitting them to?
My throttle bodies are actually 2 2nd hand sets from a Triumph 959 motorcycle. They (used to) go for peanuts on Ebay, the 2 sets cost me around £90. I had to have an adapter plate made up to fit them to the engine. The engine management system I bought is an emerald M3D. Its a nice ecu with lots of features one of which is that is is possible to have 3 different maps so I have chosen to have a full power map an economy map and a valet map which limits rpm to 3000 should I ever need to leave the car with someone.
The economy map got me home 168 miles at an average of 32.2 mpg at 60 mph so I'm well pleased with that as it means going on trips or to shows won't be such a big hit in the wallet.
gazzol
Well-Known Member
Thanks Zinz, I made a choice very early on NOT to go forced induction for that very reason, when I go out in this car it's all about the theatre of driving it, the smells the vibrations and above all the noise
P. S if you liked the other driving video you'll love this one as the rev limit was raised from 6300 rpm to 7300 in this one although you only hear it right at the beginning.
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Those are Imperial gallons? In US gallons that would be 27 mpg if I calculated correctly. One US gallon equals 0.833 Imperial gallons. My b35 and five speed easily gets 25 mpg between 70-75 mph. I have never driven at 60 however!
gazzol
Well-Known Member
Yes those are imperial gallons, which gearbox do you have Chis? I have the dogleg which would be the same as the 4 speed in top. I only ever drive at 60 when I'm on the motorway and that's because I get far less tired and arrive more relaxed when I'm sitting behind a truck rather than getting frustrated at all the idiots driving in the wrong lane, getting in your way, cutting you up and driving too close. The standard of motorway driving in this country is shocking, I might drive at 70 next time just to do a comparison.
Indeed... sounds AWESOME