Auto to manual,

 

Is the engine exactly the same in the 2?

And is it then just in the autobow where the power (bhp figures) difference lies :confused:

 

Does anyone know for definate?

I think the auto has different cams. It certainly has different turbos.

I'm not 100% sure - one of the clever boys will be along soon I should think.

thanks for that mate, hope to hear from them soon lol

lower on bhp too, i have an auto engine in my manual, tubs and cams main things

Lower power but better midrange for better acceleration. Probably!

not wanting a fight, but i was under the impression the auto was quicker in a straight line so bhp cannot be hugly lower than a manual? or is that due to the turbos not dumping boost between gears?

not wanting a fight, but i was under the impression the auto was quicker in a straight line so bhp cannot be hugly lower than a manual? or is that due to the turbos not dumping boost between gears?

no mate, just means you were under the wrong impression lol

 

The car is slower low down, but mid range is far better on pick up. i miss my old engine though

lower on bhp too, i have an auto engine in my manual, tubs and cams main things

 

 

So do the different cams give a better torque figure then?

 

But then 0-60/0-100 etc would be pretty much the same anyway?

not wanting a fight, but i was under the impression the auto was quicker in a straight line so bhp cannot be hugly lower than a manual? or is that due to the turbos not dumping boost between gears?

 

 

A car can be quicker with less peak bhp if it has a bigger midrange. It's the area under the graph, not the highest point. Unless you ride the arse off the clutch (not possible on an auto anyway).

 

I think the auto TT may be 0.1 secs quicker over the standing quarter than a manual TT. Or it might be 0-100mph.

A car can be quicker with less peak bhp if it has a bigger midrange. It's the area under the graph, not the highest point. Unless you ride the arse off the clutch (not possible on an auto anyway).

 

I think the auto TT may be 0.1 secs quicker over the standing quarter than a manual TT. Or it might be 0-100mph.

 

 

I think its either the 0-100 or to 60

just looking at an engine, how can you tell which is which?

pics are helpful

Auto TT has different intake cams to other engines (Man TT, Man NA, Auto NA).

All exhaust cams same

Auto TT turbos have smaller exhaust housings

96+ all have same intake cams.

performancewise, the auto is supposedly slightly slower to 60 but slightly faster to 100. powerwise, its been an ongoing argument as to whether there's a difference in bhp or not.

i had mine converted from auto to manual and ive not really noticed any difference in power or performance. it does however make it a totally different driving experience IMO.

at the end of the day if you do need to convert and do notice worse performance (highly unlikely) then just whack the boost up or shove some jets in ;) job done

mine is already converted from auto to manual, im wondering which engine is bettre as i thought that the auto box was where the power loss was hence they made adjustments to get it up to the same spend as the manual (accelartation that is), so with that in mind would a manual car with an auto engine not be a little better :confused:

at the end of the day bud, you havent felt the full potential of a zed engine for yourself, so you wouldnt know if the new engine is quicker or not

 

HTH

at the end of the day bud, you havent felt the full potential of a zed engine for yourself, so you wouldnt know if the new engine is quicker or not

 

HTH

 

 

Thats a good point but the thing is that i want to know the differences and why one engine doesn't have the power, as far as i was aware the auto TT was only down on power due to losing it in the autobox its self

If I was looking, I'd go for the best engine I could get and not worry if it was auto or manual. Just my opinion!

 

edit - Auto TT engine makes less peak power than manual TT but more power lower in the rev range. The autobox will sap a bit as well.

apparently its better to have auto tubbies in a manual - something to do with quicker spool-up i think. but basically at the end of the day its nothing noticeable and all cars are different anyway.

well i was always told that manual tt,s have bigger tubs, different cam profiles and a highre 5th gear ratio for a higher top speed

 

not that it matters cause i will still wip ya lol

 

not that it matters cause i will still whip ya lol

 

 

 

 

can you two keep what you do in private, PRIVATE

Thats a good point but the thing is that i want to know the differences and why one engine doesn't have the power, as far as i was aware the auto TT was only down on power due to losing it in the autobox its self

No, power difference was down to Cams and Turbo's. They sacrificed top end power to make up for the low down torque losses from the autobox.

No, power difference was down to Cams and Turbo's. They sacrificed top end power to make up for the low down torque losses from the autobox.

 

ok, so if the auto had better torque due to it having lost torque through the autobox the auto engine with a manual box would be slightly quicker then :confused:

well i was always told that manual tt,s have bigger tubs, different cam profiles and a highre 5th gear ratio for a higher top speed

 

 

Actually: taken from a previous post

 

 

Apparently the auto has a higher top gear and hence a higher "theoretical" top end.....

 

http://www.300zx.org.uk/gear_ratios.htm

ok, so if the auto had better torque due to it having lost torque through the autobox the auto engine with a manual box would be slightly quicker then :confused:

No, auto engine has lower bhp and torque but more responsive low down.

 

Autobox has no affect on the engine power figures, only the power output at wheels.

No, auto engine has lower bhp and torque but more responsive low down.

 

Autobox has no affect on the engine power figures, only the power output at wheels.

 

 

So FwBHP will be lower but power at the wheels higher then

So FwBHP will be lower but power at the wheels higher then

 

an original manual will more powerfull at the wheels & fly than a Auto-> manual conversion, but the Auto to Manual should in theory have quicker spool and a bit more response in sacrifice for power.

 

I dount there will be much difference in performance between them at all, especially at stock boost.