Toyspeed.org.nz Message Board

by **RedMist** » Sun Jun 05, 2011 10:13 pm

Looking to build up a 3s engine to run longitudinally, mid, in an offroad race car. I'm looking for around 350-400 hp. Wondered what others have tried and what would be the best engine to build up as a turbo.

Constraints are pretty unlmited. Turbo either a GT30 (antilag) or a BW EFR. A CR of around 10:1 running E85 or possibly E30. I'll also need to run a W2A in order to minimise lag and keep the intercoolers out of the mud.

Was thinking Beams/turbo, or a Gen 3 3sgte.

by **Prymal** » Sun Jun 05, 2011 10:14 pm

what about a rotex supercharged option .. would thast be more ideal with your need for traction from mark dot , not sudden turbo coming onto boost ?

by **strx7** » Sun Jun 05, 2011 10:27 pm

get a altezza engine and put forged pistons and rods in it. variable cam timing is where it is at and the block and crank is the same strength as the turbod ones

by **RomanV** » Sun Jun 05, 2011 10:34 pm

Altezza motor definitely easiest if running north/south.

A Rav 4 beams motor alledgedly has 10:1 compression ratio, lower than any other beams motor. But still with good head design and VVTI etc.

by **Burning Angel** » Sun Jun 05, 2011 10:57 pm

strx7 wrote:get a altezza engine and put forged pistons and rods in it. variable cam timing is where it is at and the block and crank is the same strength as the turbod ones

This.

no grip · by **Akane** » Sun Jun 05, 2011 10:58 pm

definitely altezza. Tuned a 300hp altezza with the whole apexi package and it felt very strong, only a boost dial away from 350hp+

by **RedMist** » Mon Jun 06, 2011 9:29 am

I gather this is because people think the head flows better on the Altezza?
Any proof?
I also gather that the Altezza block is similar if not the same as the 3SGTE? Crank the same? and it'll handle 400+hp okay?

by **iOnic** » Mon Jun 06, 2011 10:02 am

For the most part - I'd imagine that the fact that the Altezza engine starts life out longitudinal in the first place would be the biggest selling point in your situation. Any 3SGTE will make the power you want and then some so I'd focus my attention more on which is the easiest to mount/work on in your situation. Since you're looking to mount it longitudinally/upright then starting with one that is already designed that way would save you a whole world of hurt IMO

by **strx7** » Mon Jun 06, 2011 10:29 am

RedMist wrote:I gather this is because people think the head flows better on the Altezza?

it does have a hunt around the net, it appears to flow around 30cfm more in standard form. and vvti over non vvti anyday for broader power band and quicker spool up

by **RedMist** » Mon Jun 06, 2011 3:13 pm

strx7 wrote:
RedMist wrote:I gather this is because people think the head flows better on the Altezza?

it does have a hunt around the net, it appears to flow around 30cfm more in standard form. and vvti over non vvti anyday for broader power band and quicker spool up

I agree re the VVTi. Made an incredible difference in spool rate on my V6.

Are the blocks interchangable between the gen 3 3sgte and the Altezza? I'd like to keep one standard between the rally car (st205) and the offroader. Hence the desire to run the 3s* in the first place.

by **strx7** » Mon Jun 06, 2011 6:18 pm

the ST205 block doesn't have the oil feed provisions to feed the VVTi solenoids but you could plumb them from elsewhere to feed them.

by **RedMist** » Mon Jun 06, 2011 6:21 pm

I understand that the ST205 block has no provision for a RH engine mount...which mean I'll need the beams engine in the Jimco. The question is, can I mount a beams turbo engine in the ST205!
I'd also like to run the stock ST205 W2A. However that would mean running the ST205 intake manifold. Which leads to another question. Will it mount/align?

by **iOnic** » Mon Jun 06, 2011 6:45 pm

I doubt the Altezza engine would fit under the bonnet especially with the extra height of the manifold. I'm sure it is doable but it would cost far more than is practical. If you really want a turbo beams why not go for the redtop engine modified for boost?

by **Malcolm** » Mon Jun 06, 2011 7:36 pm

iOnic wrote:I doubt the Altezza engine would fit under the bonnet especially with the extra height of the manifold. I'm sure it is doable but it would cost far more than is practical. If you really want a turbo beams why not go for the redtop engine modified for boost?

Far more than practical? Pretty much just a new intake and exhaust manifold... Also I would think the issue with the Altezza intake manifold would be the plenum hitting the firewall when tilted back for the ST205, rather than having insufficient bonnet clearance

by **RedMist** » Mon Jun 06, 2011 7:50 pm

I gather the ST205 manifolds don't fit the beams engine.

So easiest option is the ST205, 3sgte stood up?
So custom sump and pickup, try and tie an engine mount in somehwere, anything else?
What about running the beams sump and pickup on the 3SGTE.

by **iOnic** » Mon Jun 06, 2011 8:37 pm

Malcolm wrote:Far more than practical? Pretty much just a new intake and exhaust manifold... Also I would think the issue with the Altezza intake manifold would be the plenum hitting the firewall when tilted back for the ST205, rather than having insufficient bonnet clearance

The way I read his post, it sounded like he wanted to fit the st205 intake to the physically taller Altezza engine while still in an upright orientation with a w2a ic on top. Definitely too tall for an ST205 profile. Might have got it wrong I guess.

by **RedMist** » Mon Jun 06, 2011 8:57 pm

that's exactly what I was talking of. Didn't realize that the beams engine was so much taller.
So.... 3sgte st205 set upright for the offroader.
As such will the beams sump fit to the ST205? anything else I'll require?

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