Indeed

Hey everyone, looking to purchase this car

http://www.trademe.co.nz/Browse/List...x?id=256130990

It looks a little untidy, but that isn't a major. I'm wondering about the engine. Do you guys think 400-500hp is realistic on that setup? Also I'm a bit new to this and I don't really know what the difference is between a street tune and a dyno tune so could someone tell me? And what is involved in this 'running in' of the engine/what does it do?

thanks

Aaron Cake

iTrader: (1)

The turbo will support those power levels, but there is no enough fuel (with only 4 850CC injectors) to make that power. Driven to maximum duty cycle, those injectors might squeak out 400 RWHP at higher fuel pressure.

"Running in" refers to a a breakin. New engines must be driven easily for the first 500-1000 KM (opinions differ greatly on this) and then can be beat up.

Dyno tuning takes place with the car strapped to a dynomometer where HP levels are measured after each run, and then changes to the tune made to maximize HP/torque at all points in the tune. A dyno will let the tuner isolate any load point on the engine and tune each point. That is if they know what they are doing. Most tuners just use the dyno to tune wide open throttle.

A street tune involves making wide open throttle runs in various gears on the street to accomplish the same thing on the dyno. It is done by feel as opposed to hard numbers. There is nothing wrong with a street tune if done properly but if done improperly, areas of the map could be left untuned.

Indeed

Hey thanks for the prompt reply. So say if I wanted to test drive it now and it hasn't been fully run-in, I won't be able to really put it to the test (i.e. thrash it)?

Also how can I tell if it is bridgeported or if he made it up (noob question).

FCJoe

Its very easy to tell if the motor has been bridge ported, look up sound clips on youtube and you should be able to tell instantly when you see the car running. This also depends on the amount of porting done though.

Aaron Cake

iTrader: (1)

If the engine is bridgeported, it will have a rolling "brap brap brap......brap brap brap" idle and draw low vacuum (around 7-10").

dgeesaman

iTrader: (7)

I have to wonder, who on earth would warranty a motor that "should make" 500hp?

FYI that's a pretty intense setup. Have you owned a car with that kind of power/weight before?

David

Indeed

hey no I haven't had a car with this power/weight before, but have had ones close to it.

what is the problem with putting a warranty on this motor? the warranty doesn't applied to rolled seals or something, which I was told will only happen if I wind boost up or something. is this right? cheers

dgeesaman

iTrader: (7)

If the car's actually 400 or 500hp, the boost is wound up. That's why I question the value of the warranty.

Dave

gracer7-rx7

iTrader: (16)

Bridgeported motors aren't particularly streetable. They are loud and don't pass emissions tests at all.

No one will warranty a bridge ported motor. That just sounds like a fallacy.

The fuel system is also inadequate. I'd recommend you look at a different car.

Indeed

the 400hp figure I think is false. It hasn't been dyno'd that was just the estimate. And yea the warranty states it doesn't cover apex seals. does that sound a bit weird to you? I thought that was like the only way the engines blow up..Boost is currently set at 15psi and it has a microtech ecu.

Aaron Cake

iTrader: (1)

The whole thing sounds a bit weird. The odd warranty, the smallish injectors and the lack of a dyno number.

Indeed

I think it seems a bit weirder to you guys because I'm from new zealand and bridgeports seem to be more common here. I have heard of a lot of bridgeport engines getting warranties in new zealand.

Anyway, back to the tuning thing - since it was only street tuned and has just finished being run-in, will it need a dynotune now? or will it be ok without? thanks

Aaron Cake

iTrader: (1)

My 2nd gen is a 500HP half bridge, so I know where I'm coming from.

It sounds like the street tune was only for drivability since the engine was not broken in. So the map probably needs to be completely tuned for wide open throttle and under boost.

Still not enough injector unless they are running some ungodly high fuel pressure.