What camshafts would be nice?

[Jan Pedersen]

If I where to build an engine I would go for a 7 ribbed block with 40 mm crank. This will make it rev a lot faster which is a big part of a 4AG. If you want high rpm you might want to get some after market con rods. And last a small port head with a good port job

Cam wise I would go with the most lift possible with stock springs or go crazy and modify everything

[apardal]

Project D Wrote:Ask to woper the list of his old setup.
For the few thing that I remember:
HKS 272°/8mm, forged piston, ITB, Standalone ecu -> 180hp
I hope it might help.

That's an optimistic number... really.

If you can get up to 160-165hp with that setup it would be very good.

[Project D]

apardal Wrote:

Project D Wrote:Ask to woper the list of his old setup.
For the few thing that I remember:
HKS 272°/8mm, forged piston, ITB, Standalone ecu -> 180hp
I hope it might help.

That's an optimistic number... really.

If you can get up to 160-165hp with that setup it would be very good.

One of my very good friend have 162hp (I have the dyno sheet...) with HKS 256° cam and carbs, so I realy don't think it's optimistic...
Just correctly tuned, that all.

And for the 86 of woper, the full spec of his engine is avalable HERE
(and as you can see he put his car on dyno....)

[robokill]

before we start talking on if its possible or not. Let me state that those horsepowers that Woper gained are crank HP.

Which means its a guess because its a % of the driveline loss. So it will probably not be very far off.

But to be honest.

Engine horespower is useless. You want power on your wheels not only in the engine. Sow hen it comes to power how much WHP do you truly want?

Answer that and we can give you some tips on what you are looking at. But first give abit more specification on what you expect from the engine.

You can drive most engines on the street but what do you expect of it. Gives us some more info.

[PatrickAE86]

so you guys think those catcams 7105140 are way to agressive for stock pistons/conrods?

and what about the 7105139 ?

they are intake 275° exhaust 267°
intake lift 10mm exhaust lift 9.50

actually i was thinking around 170 whp?

[Bean]

PatrickAE86 Wrote:so you guys think those catcams 7105140 are way to agressive for stock pistons/conrods?

and what about the 7105139 ?

they are intake 275° exhaust 267°
intake lift 10mm exhaust lift 9.50

actually i was thinking around 170 whp?

there's the trouble I personaly wouldn't risk running 170whp on stock internals certainly not on the early bigport ones without at least treating them... using internals that have done a 100k miles already and then squeezing out an additional 80% power is pushing it...

and as mentioned befor catcams are quite steep... HKS 272 cams have 'only' 234° @1mm lift whereas this would equal about 264 duration for Catcams - so it's realy up to you just remember the longer the duration te later it'll produce any useable power in the revrange... as a guess I'd say peakpower (depends on a lot of other factors aswell) with the 139s would be around 8500 or even later... usualy you'd want to have peak power at Xrpm and redline at X+10%ofX

[Project D]

Do you realise that 170whp mean around 210hp at the crank ?!
You can't have that much only with camshafts...

[PatrickAE86]

hmm ok.. sorry for that one..

thanks for al this information

what about 170 ish crank HP.. think that would be a more realistic goal tho?

i'm using a 7rib block with 40mm crank and 18m smallends...
alle new bearings and arp conrod bolds
shimmed oilpump

[totta Crolla]

In that case all you need is here:
http://www.aeu86.org/viewtopic/cams-for-...t=camshaft
:wink:

[Bean]

in that case I'd say if you fancy to fit solid/underbucket lifters go for the 148s or 149s (will need to rev slightly higher than 148s) and hope for the best (a longlasting strong bottomend)

this will probably but you in the regions between 170 and 190 crank hp depending on how good the rest is set up...