power up mods for the 20V

[4A-G3]

[SAMS EDIT] all 20v atmo power increase mods in here



hey everyone

I have just bought an ae86 with a BT20V in it

I just did the ecu to a Wolf 3D ecu all done and tuned by Sprinterman, Car made around 86rwkws and i want to bump it up to around 130- 150rwkws, want to know if the following mods will increase power by that much

20V 304deg 9mm Camshaft (Pair) - Toda
20V AE111 Blacktop Adjustable Cam Gear Set - Toda
multi-angle valve seat job
Valve springs
port and polish of the head
another fine tune

I have about $5500 - $6000 to spend on the engine alone
Any other ideas on how to get the kind of power im looking for (Im a P plater so turbos ect ect are out of the question)

[charged]

The only way to make 130-150rwkw is turbo maybe those mods will yield a little over 100kw but not much more, the heads on the BT are very good already so a port wont achieve much, Cams may help but BT cams are fairly aggressive already. I would raise comp and run on e85 as that will give you about 10kw. Better of going a 7age-9age route for NA

[4A-G3]

So there's no other mods to get that kind of power out of the blacktop spinterman told me just with cams and a few other goodies I can make 113kws at the wheels he was telling me about his one that he did just a stock silvertop with the same ecu he put in mine the wold 3d and just rebuilt it with stock internals and he made 123kws at the wheels

[charged]

On my engine I have Autronic ECU, comp of 13.5:1, headers, trumpets, toda pistons, spool rods, ported head, 440cc inj and tuned for e85 and it made 105rwkw on a mainline dyno, my brothers silvertop with stock internals and tuned for e85 made 103rwkw on a dynappac dyno which reads higher than a mainline. 123kw ....... must be a very high reading dyno

[xero]

by sprinterman you mean john right?

if you can wait about 3 weeks, i'll find out exactly how much power i get out of my high comp 16v he built using similar cams and what not...
as john (charged) said, getting that much power out of a blacktop will require lots of compression, revs and big cams, maybe even E85. but the power figure on a peice of paper doesnt mean squat really, its how it delivers the power. i made a similar figure earlier this year and i could easily keep up with mates with much more powerful cars both on the street and track.


EDIT: john yours and your brothers wouldnt be tuned for out right power though? (being a race car though you do want every last pony you can get)

[Delazy]

Im suprised by chargeds engine numbers. Ive seen a stock ae101 20v with an exhaust and adaptronic make 96rwkw on a mainline dyno. Let alone with those kind of mods :s

Ive got a built ae111 20v 7age im hoping to crack the 115-120rwkw mark on 98ron...even then the thing owes me a mint...

My only advice ill give is be sure you want to drop that kind of money on a built n/a motor...as quite alot of people will more than likely find themself disappointed...6k on an sr20 would get me 270rwkw...10k on my 7age will hopefully get me 120rwkw lol...big difference

[fantapants]

the only 4a i have heard of coming close to those figures na was beau with the trd replica. his was bought with what was meant to be a cataloge of trd parts and made 120rwkw repeatably, but then i think he found out it didnt have all the good bits anyways?

its a long time ago, but he is still around so might be worth hitting him up for what might have been the secret lol.

fwiw my 20v silver made 87rwkw with a motec and open trumpets.

in a similar guise it made 104rwkw on a different dyno. dyno's are just a tool.... like me

[charged]

As fantapants has stated dynos are a tuning tool that is all HP is irrelevant. I will be putting mine on a dynapac early next year with hopefully some big kelford cams and see what it does.

Ours are tuned for ever last bit of HP we can get but safely.

I know from my last engine to my new one with more comp etc its 12 secs faster around Bathurst and has a lot more sniff everywhere, I was passing a lot of cars I couldn't pass the previous year

At Bathurst in 2009 I was the slightly faster than the yellow and blue alfa and slower than the red alfa and slower than the jag.

In this video with the new motor at Bathurst in 2010 I can pass all of them easily, so on paper there isnt much difference from old to new but on the track there is plenty

FWIW MY mate runs a EK civic in IPRA with a B18C 1800cc engine with decent exhuast, quad throttles and a hondata computer and that makes 115 front wheel kilowatts.

[Delazy]

Beaus motor was a freak...but yeh from memory it didnt end up having half the bits he thought it did...believe gunner ended up with most of the parts and sold them on including the carillo rods and toms throttles...

[Gunner]

^^^True, the engine I got was stock, apart from the throttles, headers, and head work, there wasn't much else done.

But no one will ever be able to put that back together. The head is on a drag spec 20v, someone here has the stock rods and pistons, I still have the block, the throttles went to adeliade from memory, the carillos are in sydney, delazy, has the valve train, the headers went interstate as well, but yeah, big power apparently can be made with a stock bottom end.