"Parmas" Motor

[cali yaris]

stock head studs are not a good idea. We had to custom make a set, but there is a company overseas making them. Can't vouch for the quality though.

[Parmas]

Originally Posted by cali yaris

there is a company overseas making them. Can't vouch for the quality though.

What company are you referring to?

[cali yaris]

http://www.microimageonline.com/foru...lts-yaris.html

You posted that the link doesn't work for you, but I just tried it and it came up ok.

[Parmas]

Originally Posted by cali yaris

http://www.microimageonline.com/foru...lts-yaris.html

You posted that the link doesn't work for you, but I just tried it and it came up ok.

Still getting broken link ...

Although I got some news that AJUSA head bolts are similar to standard Bolts or else equal. I will be probably getting them custom made from DP.

What can you tell about porting? Is it worth doing it from experience? What is the average increased hp?

What about Knife edging crankshaft? What are the pros and cons of it?

What about doing upgraded sleeves? At what power they are really needed?

Come on is only Garm helping here... where are the experts

[CtrlAltDefeat]

http://downforeveryoneorjustme.com/i...manceparts.net works for me and downforeveryoneorjustme.com says its up

[cali yaris]

I sleeved my Yaris block because we knew we were going for 20+ pounds of boost.
I would sleeve it if you intend to throw 15+ at yours.

Porting/polishing increases airflow. The effect and increased hp is amplified when you throw boost at it (more air trying to pass through, obviously). I would do it.

I am using stock crankshaft, and I like the results I'm getting so far.

[rob323]

What can you tell about porting? Is it worth doing it from experience?

If you have the head apart, then you may as well do it. NA motors benefit from it more so than forced induction motors (the pressure from the turbo helps negate some of the inefficiencies in the intake).

What is the average increased hp?

Impossible to say, it varies with each and every car and how the porting is done.

What about Knife edging crankshaft? What are the pros and cons of it?

It reduces the reciprocal weight of the crank shaft, good for high revving motors (8000 rpm upwards). I wouldn't worry about it on your motor as you will have to fully rebalance the motor once you have done it. (Then again, if you are replacing the pistons, then you should fully rebalance the motor anyway).

What about doing upgraded sleeves? At what power they are really needed?

I haven't heard of anyone cracking a sleeve yet? Maybe some of the Scion boys have though as they have been putting boost through these motors longer than most?

[Parmas]

Ok so porting will be one on my list.... Then what about stock valves and springs? Are they capable of 20+ boost?

I made some more research on knife edging the crankshaft. They usually make it on Honda engines but since it doesn't cost that much I would probably do it.

RE: Sleeves... My Power intensions are somewhere near 300Hp. Considering that I am using a turbo GT28 and using street pump low grade octane fuel (Below 90) the engine would need about 25psi of boost to get into that range. The tuner said, if going to do sleeves, the pistons could need to be replaced to match new sleeves... so it would cost me a fortune to make this happen!

[changchewsoon]

hi parmas,

im too getting my head ported as well. at the same time, i fully agree with what garm said. the more air you could flow, the better. and results will be amplified when you boost it. you should go ahead and get a "head job" :)

im also having my cams welded and grinded too, and the valve springs will be changed as well.

as for the AJUSA bolts, i could only comment that the bolts are much more heavier than the stock ones. however, heavier does not mean they are better. i can only tell you this much, and until my cylinder head is back i don't have further inputs on that.

im currently keeping my crankshaft stock though, tuner did not recommend me to have them knife edged so i did not pursue that.

[Parmas]

Thanks for the info changchewsoon

What valve springs are you intending to use? Regarding cams I think I leave them stock don't want to mess everthing at once

RE AJUSA bolts, heavier doesn't meen better but the quality of metal used. Do you know if they match exactly the stock bolts? I mean no rethreading etc..

RE Knife edging crank, Did you asked your tuner the reason not doing it?

[changchewsoon]

Originally Posted by Parmas

Thanks for the info changchewsoon

What valve springs are you intending to use? Regarding cams I think I leave them stock don't want to mess everthing at once

RE AJUSA bolts, heavier doesn't meen better but the quality of metal used. Do you know if they match exactly the stock bolts? I mean no rethreading etc..

RE Knife edging crank, Did you asked your tuner the reason not doing it?

i just got a call from my tuner that my cylinder head just came back, im gonna go snap pictures tomorrow and i'll ask him about the valve springs.

reason why the shop that was working on my head changed the valve springs is because we told him that we wanted to increase the rev limit to at least 8,000 rpm or above.

the AJUSA bolts does match the stock bolts, the only think im not able to comment is the quality until we use it.

as for the knife edging crank, i did not asked him why we do not need to do it.

[Parmas]

Originally Posted by changchewsoon

i just got a call from my tuner that my cylinder head just came back, im gonna go snap pictures tomorrow and i'll ask him about the valve springs.

reason why the shop that was working on my head changed the valve springs is because we told him that we wanted to increase the rev limit to at least 8,000 rpm or above.

the AJUSA bolts does match the stock bolts, the only think im not able to comment is the quality until we use it.

as for the knife edging crank, i did not asked him why we do not need to do it.

Wow man 8000rpm seems too much for a 1NZFE although I wish you all success in your project. I think in your case, knife edging the crank will help you more reach that goal.

Keep us updated

[cali yaris]

RE Knife edging crank, Did you asked your tuner the reason not doing it?

rob explained this point quite well.

I'm about to tune upwards of 25 psi, on stock crank and stock valve springs. I just don't see the need to spend money there when it's not necessary.

[Parmas]

What fuel octane are you using Garm?

[cali yaris]

91 with water/meth injection. Should be able to run 25 psi on pump gas.

[Parmas]

Originally Posted by cali yaris

91 with water/meth injection. Should be able to run 25 psi on pump gas.

I thought you have a better (directly from pump) octane than 91 there!

[rob323]

Stock valve springs are designed to work with the stock rev limit and the stock lift and ramp angles on the cams. If you change any of those, only then do you need to look at a heavier valve spring.

[cali yaris]

I thought you have a better (directly from pump) octane than 91 there!

I can get 100 down the street, and I can buy buckets of any race gas I want, but I don't need it with the meth injection.