does 64mm throttle body needs intake manifold inlet to be bored to same size?
07-15-2016, 06:21 AM
#42
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Join Date: Sep 2014
Posts: 47
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Right it's all fitted and running sweet with no leaks. Sure feels like less pedal makes more throttle due to the bigger butterfly which is fun. Not sure if it will gain any peak power but time will tell! Looks cool none the less 
Slight whistle at part throttle due to resonance down the channel to the idle control valve (from reading a post on here) but barely audible over the exhaust and choo choo
Slight whistle at part throttle due to resonance down the channel to the idle control valve (from reading a post on here) but barely audible over the exhaust and choo choo
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07-21-2016, 01:50 PM
#45
Junior Member
Join Date: Sep 2014
Posts: 47
Total Cats: -7
Well the results are in and it's not what I expected at all. The car felt quicker and we will see why in a minute. I'm pretty sure it's all gone back together as it should with no boost leaks so let's go on the assumption that this is the case.
Today was hotter and a lot stickier than last run but I had a chance to get down so had to take the opportunity.
Peak torque and power figures were down from last time I'm sad to say (-5hp and -7Nm). I was mortified by this I'll be honest. The guys at the garage said that the hot and muggy conditions will have accounted for this and a freeer flowing mani won't be detrimental to peak power so read it as "makes no difference"
Not sure if they were trying to make me feel better but I'd have liked to have seen more or the same peak power. Never mind it's an experiment.
Anyway now for the exciting part. The engine makes loads more power as it comes onto boost now between 3 and 4k in fact it makes a huge lump in this area which is why it feels quicker.
I've tried to get a rough idea of figures but at 3.5k rpm it's making circa +17hp and +30Nm (22ft lb)
This is a result in my eyes big gains from quicker spooling makes for big fun. I'd like to see the peak power back but maybe on a crisper cooler day.
Sorry for the ramble it's been a long week.
Dyno sheet here
Today was hotter and a lot stickier than last run but I had a chance to get down so had to take the opportunity.
Peak torque and power figures were down from last time I'm sad to say (-5hp and -7Nm). I was mortified by this I'll be honest. The guys at the garage said that the hot and muggy conditions will have accounted for this and a freeer flowing mani won't be detrimental to peak power so read it as "makes no difference"
Not sure if they were trying to make me feel better but I'd have liked to have seen more or the same peak power. Never mind it's an experiment.
Anyway now for the exciting part. The engine makes loads more power as it comes onto boost now between 3 and 4k in fact it makes a huge lump in this area which is why it feels quicker.
I've tried to get a rough idea of figures but at 3.5k rpm it's making circa +17hp and +30Nm (22ft lb)
This is a result in my eyes big gains from quicker spooling makes for big fun. I'd like to see the peak power back but maybe on a crisper cooler day.
Sorry for the ramble it's been a long week.
Dyno sheet here
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