Thread: Safe max rev on SRXXVE cams

I dont have the dyno sheet as the dudes printer was broken.

Here was Peters setup

Stock internal VE
N1 cams set at 0,0
n1 ported intake manifold and n1 throttle body
SSAC header 2.5 collector, 3" exhaust no cat
Gpsec 2 piece pullies
JWT lightweight flywheel
3" intake w/ jwt pop charger
e60 maf
Calum Realtime ECU tuned by me

The car made 196whp most likely due to the badly dented secondaries on the ssac header.

Car peaked power right at 7900 or 8k. Cant remember exactly. However the car still held over 180whp to 9000. These are facts.

So once again, to say it is pointless to shift at 9k when you would fall right back in the heart of the powerband is dumb. This has been proven on runs made back to back with my buddies turbo nx. He was shifting right at 8000-8200 and lost the race by a car length. I said what are you doing, shift at 9k and they rematched and the VE pulled 2 lengths on that same nx, basicly back to back runs. No difference other than shifting 1000 rpm later.

And again, even RB's graph, if you drop 2k rpm during any given shift, do the averages, wait i just did them myself.

Shifting at roughly 9k with a 2k rpm drop so average power from 7k-9k is 194.5 whp, while average whp from 6500-8500 accounting for that same drop is 192.6whp average. While minimal, its still a difference and numbers dont lie.

With shorter gearing yes that will change and 8500 could be your better shift point if say you only had a 1700 rpm drop between gears.

Again i know a stock trans is more than a 2k rpm drop as well. This is just doing averages. In that case the more of an rpm drop is more in my favor as the average will be worse because below 7k the numbers fall rapidly compared to after 8500.

If you really cant see that then well i dont know what to tell you. Ive been drag racing for a long time, both n/a cars and turbo and i can tell you in this case using that graph as an example, 8500 is too low to shift.

Either way, you are all misunderstanding me. I clearly said the best way is to use the dyno graph you have and pull your averages from the powerband that you will be in during shifts and so on. If you have a crappy setup and crappy tune n1 setup that peaks at 7500 and maybe holds decent power to 8200 then yeah by all means your shift point will be lower.

However, a properly done n1 cam ve, tuned properly, w/ cams set to 0,0 (again also allowing power to hold out longer vs having them at say +5,-5 which used to be a common thing) the motor should hold pretty good power out to 9k. More power than it would be making at say 6500 and again this is what Ive seen with Peters and several other properly done n1 cam ve's from even 6-7 years ago till current.

More guys need to step up and pay for custom intake manifolds. By far one of the BEST mods to do to the VE motor. Shitty intake manifold/header combo is the reason for lower peak power. I have personally seen stock VE with a good intake mani, N1 cams, header, 3" exhaust, stock motor otherwise peak at ~8,800 rpm.

Exactly, and even stock cam ve's with good bolt ons and a good tune will make peak power at 7200 then still nosedive quickly but still. For n1's to be peaking at only 7500, there is something choking it

Im sorry I dont have Peters graph but I wouldnt just make this stuff up.

And if you dont believe me when i say even what a crappy tune can do to a car, Peters car with just the base map loaded from calum went in and made a whopping 168whp and didnt make squat past 8k as it wanted to go very very lean. Once I was done, 196whp and making good power all the way to 9k.

And we are talking a car with a 100 dollar header with bent secondaries. He had a good intake side though so thats why it still managed the power it did. Id say with a good spec'd header, 205+ pretty easily.

i completey understand wat ashton is triyng to say about the shifting point

It this 100 percent true? So if you set the rev limiter past 8200rpm it is not actually there?

Reason I ask is because it's actually pretty bad to bounce off the rev-limiter once you are in the 8000rpm+ category. You can do some valve damage from the physical act of hitting it, throw rocker arms, etc.

Depends on what your using. The basic chipped ecus, yes if you set the limiter over 8000 its removed. Now the newer chipped ecus with tunercode and nismotronic, they have the ability to set the limiter to whatever.

As well as all aftermarket ems's

U can tune past 8k withe the Nemu.waiting for mine.gona try virtual dyno,9k wid the n1

If you throw a VE rocker arm you have to take a pic and show us lol.