16v Small port VS Ae111. Rwd

[Sam-Q]

now seeing its all been done on the same dyno I would very much like to hear some of the figures you have seen in your time Frak. Thats assuming you can remember a pile of numbers. How did you find mid range power between them?

[Jonny Rochester]

For entering a tarmac rally class, I think you need a 16v head. I don't think enough people consider this.

For a cheap 100rwkw, I guess the easiest is a 20v plus some cams bolted in, plus ECU. Because the 20v has higher compression, quads, and better intake port shape.

For a full rebuild with new pistons, cams, and every aspect considered, either 20v or 16 your choice.


But I don't think you will get 100rwkw from a internaly stock 20v. You really need bigger cams. With my calculator, I think a internaly stock AE111 20v, on a Hobart dyno (mainland dynos always read more), would get 86rwkw.

[Sam-Q]

this tarmac racing class has rules against 20v heads?

For me to get my 101rwkw I have stock cams and someone else on this forum on the samedyno at almost the same time got 106rwkw with 270/270 cams but as I said it could just be a dyno that reads high. It would be interesting to see what it pulls on one of those Hobart dynos

[Jonny Rochester]

Not if you drive a AE111 coupe, or AE111 sedan from South Aftrica, or AE101 Sprinter Marino.

[Jonny Rochester]

To me, 101rwkw is very close to 200hp at the flywheel. Well done.

My rule of thumb is, you loose 30% power. For standard motors of known power, the numbers all seam to add up with 30% on the dynos I use in Hobart. Mainland dynos are under a lot of pressure to read higher.

[Sam-Q]

I seriously doubt I would have 200hp, more like 180 I would think. Afterall all it has is raised comp, my intlet and exhuast and my own porting/matchporting.

What you have said about the rules in racing is interesting, while a very valid point I dont know to how many people on here it would apply to.

[Frak]

Jonny we use a Mainline dyno(2wd)

One must remember the dyno is a diagnostic/tuning tool.

If our mainline infact does read higher then all the 16v's I have tested have been completely pissweak, our dyno has full OBD2 logging, fuel flow measurement(working out BSFC), full data logging including exhaust temperature probes, drive cycle testing, MTBT(minimum timing best torque) interfacing(this is fantastic with aftermarket computers, autronic etc) etc etc it has an integrated weather station so I cannot 'doctor' the figures, I think I am up around 3000 runs/tests last time I looked.

I find 30% is way too high, I have done some testing from engine to chassis dyno it's about 19-21%

Sam I dynoed a st back to back with a bt just the other week on the chassis dyno, we've done the same previously on an engine dyno and the results were the same with regards to power/torque figures, little story about 10 years ago I put a st in my ae86, when I got my ae111 I could do a good back to back analysis, I felt the st had more mid range but the bt killed it above 5000rpm. So when I did the back to back this is exactly what I found, the st had more below 5000rpm but the bt was head and shoulders better above 5000rpm, the bt also pulled all the way to the rev limiter whereas the st dropped off .

Sam when I get back to work I'll print a heap of runs off and email to you, lots of JDM ae86's, ae82's, aw11's adm ae86's with 4age etc etc.

[Frak]

Sam the guy that was running the 270 cams was he running vernier sprockets and NO vvt on inlet????

[Sam-Q]

any info along those lines would be great and much appreciated.

He was running a non-verina but adjustable T3 gear on the exhuast (0 seemed best anyway) and still using the VVT. He did have a larger mid range power than me also.

edit: i realised I said 108kw before i meant 106kw

[shift_rook]

sam you're a world of information, i'll talk to you on msn soon, need cams in a month or so haha