6300 is fine, wouldn't go much beyond 6500. Some stock maps are usually 6150 and i've found one so far that had a 6400 limit.

 

6300 is fine, would go beyond 6500. Some stock maps are usually 6150 and i've found one so far that had a 6400 limit.

Roger that - my stock ECU had a 6400 limit. I've raised it to 6600 or 6800 w/ the 200 RPM variance.

 

with uprated valve springs im set at 7.3k-7.5k

T5 rev limit has a slightly lag
whatever you set it to figure the engine will probly get another 150-250rpms over that

on my old stock head i was set at 7k though it go a lil higher than that
only time i ever revved that high was in 2nd just to hit back into my power-band in 3rd

have bounced off a 7k rev limit plenty of times without issues on a stock head (as long as your engine is up to par to handle it.... maintained well)

 

have bounced off a 7k rev limit plenty of times without issues on a stock head (as long as your engine is up to par to handle it.... maintained well)

Wow,
So mine can rev to 6300 all day then ?

 

If you were road racing/auto x and needed to hold out the gear I'd probably shoot around 6500ish. I have mine set there, never intentionally hit it though.

 

I want to hit mine all the time.
I might even go 6200k

 

happy 1001's post
lol i hope you don't try to rev it there all day
but ya you wouldnt have a problem revving at 6.3k

 

Thanks Brah,

 

Would rev limit effect top speed

 

yes.... though you must be putting down some serious power to make it up to those rpms/speeds

 

This is one of my fav vids.
I've watched it repeatedly millions of times
Listen to this bounce around town

 

Considering we have the same turbo, I think this may be particularly relevant; I've set mine to 6k rpm. Why? With our turbo, and a stock head/valves, we aren't making power in that RPM range-just heat. As such, I've set mine to 6k so that 1) I don't unnecessarily wear the engine and 2) I sort of use it as a"shift point" when hard on the gas, this way I don't rev it out of the power band.
FYI, I don't generally use the limiter as a "guide", but wheel spin is a problem and as such the limiter gets exercised....frequently.
-Cm

 

Set it to 7k Greg. You've seen my early 19t 60-100 mph video. As long as the valve springs aren't shot you will be fine. Only took mine to 7k in 3rd when i was testing 60-100 times. I reckon you won't get your peak bhp till 6/6.3 revs anyway.

 

No. T5 cams choke out at that rev range and a T28 isn't exactly a "flow monster" in those revs.
Do it if you like the option/sound. Otherwise, I'd keep it ~ stock. As someone correctly said, the stock limiter lags so the revs really get to around 6500.
-Cm

 

If you motor is in fair condition (mine had a hg change and new standard valve springs) go for it. My 19t was still pulling nicely over 6k so I let it rev to 7k. If your not comfortable doing it mate, don't. It's your motor arguer the end of the day. Summat tells me you'll be spanking the **** off it though as on paper it should be a little better than my 19t

 

*Sitting at computer thinking*

 

Just out of curiosity,

If I was to install the GS valve springs. Could rev to 7k all day long?

Minimal risk ?

They are only 90 bucks (plus 200 bucks install + or -)

 

in stock form you can rev to 7k all day

the better valve spring will help take the engine beyond that (7.5K)

 

WOW 90 bucks IS cheap. We pay 90 quid in the UK for stiffer uprated Volvo springs. I'm guessing the GS springs are the same. If they are you can rev it to 7.5k iirc. I'll have to have a look at those.

 

I got my info from TrollTuner:

http://trolltuner.com/?p=901

"Stock Pressure plate (This includes Spec blue painted stock ones) should not be run past 7000rpm EVER, That means 6800 max since there is a 200 cushion in trionic. The plate deflects considerably. Running them over this is a great safety risk. We experienced multiple dowel pin failure and plate explosion on the drag car as we found this out. Cost a few gearboxes, flywheels etc…"

 

I got my info from TrollTuner:

http://trolltuner.com/?p=901

"Stock Pressure plate (This includes Spec blue painted stock ones) should not be run past 7000rpm EVER, That means 6800 max since there is a 200 cushion in trionic. The plate deflects considerably. Running them over this is a great safety risk. We experienced multiple dowel pin failure and plate explosion on the drag car as we found this out. Cost a few gearboxes, flywheels etc…"

Does this include the Viggen PP as well?

 

OK guys, I've had a night to sleep on it. (early Saturday here).
I'm going to go with a 6500 limit. Just to be on the safe side. I'm not going to need to rev it any more than that. Not with my little turbo.

In saying that, I totally agree that you can rev 7k, But that makes me real nervous and unnecessary for me.

If I'm driving it hard, I'm gunna shift @6300k with a 6500 limit.


Someone agree with me

 

I agree Greg...........

Can I smell chicken???????????

 

The bottom line is that with T5 cams and the T28 turbo, it will be pointless to rev it past 6500 from a power production standpoint.

Though it may not be "out of breath" between 6K and 7K, the peak HP will not be found much, if any past 6K. Actually, peak road HP is likely made around 5800 RPMs.

On the other side of the equation, I will add that I have analysed my acceleration and found that it falls off only a few percentage points between 6K and 6.5K.

D-

 

The bottom line is that with T5 cams and the T28 turbo, it will be pointless to rev it past 6500 from a power production standpoint.

Actually, peak road HP is likely made around 5800 RPMs.



D-

Peak power comes in @ 5870 from my logs-only a tick or two. Most of it is from ~5k; fairly flat across the magic 5250 mark.
-Cm