Engine Build Progress and Questions

[longassname]

that's an over simplification (I assume just for typing's sake) but more or less correct. Follow the sequence exactly including retorquing the first block halve's bolts after torqueing the 2nd block halve's bolts.

Originally Posted by cdigerlando

I see. 20 ft-lbs is for the other case bolts not the bearing bolts. The bearing bolts go 11 ft-lbs then 90 degrees more. The manual shows the sequence too.

Thanks

[cdigerlando]

Originally Posted by longassname

that's an over simplification (I assume just for typing's sake) but more or less correct. Follow the sequence exactly including retorquing the first block halve's bolts after torqueing the 2nd block halve's bolts.

Yes a big oversimplification. I didn't want to repeat the whole sequence in this thread. If anyone needs it I can e-mail them the breakdown/assembly section for the small block.

[sd2649]

get that engine running properly yet Tom?

[TomsSVX]

nope, waiting on whipple to get back to me about a new bypass valve I have a feeling all the issues stem from this

TOm

[sd2649]

the suspense is killing me!

[TomsSVX]

believe me... i cannot wait... I am not seeing the full potential of this motor because it pulls timing early and throughout the revs sometimes. SO this leads me to believe that with the new bypass which will let boost come on softer will keep this from happening. OR new software that knows what to do with boost early under lighter throttle. I am convinced that if the bypass is the issue, that a stock motor CAN run 12psi successfully with the different bypass valve...

Tom

[sd2649]

when you say stock, you mean stock with new injectors and MAF, am I correct?

[TomsSVX]

yes

Tom123

[sicksubie]

Originally Posted by TomsSVX

I am convinced that if the bypass is the issue, that a stock motor CAN run 12psi successfully with the different bypass valve...

Tom

I was wondering that today after we got off the phone.

[cdigerlando]

Originally Posted by TomsSVX

believe me... i cannot wait... I am not seeing the full potential of this motor because it pulls timing early and throughout the revs sometimes. SO this leads me to believe that with the new bypass which will let boost come on softer will keep this from happening. OR new software that knows what to do with boost early under lighter throttle. I am convinced that if the bypass is the issue, that a stock motor CAN run 12psi successfully with the different bypass valve...

Tom

Tom:

What exactly is happening that is causing you to think that the bypass valve is causing your problem? I assume you are referring to the bypass valve that blows off boost pressure when boost levels pre throttle are significantly higher that boost levels in the intake manifold. Kind of like a turbo blowoff valve.

One nice think about the tec 2 is that you can waste your bypass or blowoff valve to atmosphere, since it does not use an MAF. It's also tunable.

If you are going into detonation with the 8.5:1 compression pistons, it's a good bet the 10:1 compression pistons were also going into detonation. Have you ever considered a water injection or methanol injection system to reduce detonation? I know you guys can't easily set up an intercooler, so something like this might help. Also if you could get an idea of what your intake temperature is after boosting, that might help you out as well.

I wish I could tell you I could help with the tuning. I'm picking up my motor today. The crank should be finished some time next week. The next few weekends are tied up with a number of different tasks, so it looks like the motor won't be going in until January. That is if I get intake cams by then. I will be sharing my tuning information with everyone following the installation of an intercooler, so hopefully this helps, although it won't be for a while.

Chuck D.

[TomsSVX]

I am convinced the bypass valve is supplying more boost too early than the ECU is meant to read. That is why I am seeing 13 value AFR's and timing pulling back up to 10 degrees So like I said, it is a mechanical issue, not really a software issue unless I wanted full boost at 1/2 throttle

Tom

[sicksubie]

I think that we were seeing knock because boost was coming on too fast and too soon. The bypass valve spring is too stiff which is also why we are only seeing about 10-11" of vacuum. Tom said that it should be around 15-16" and the reason it is not is that we actually have small amounts of boost occurring at idle. I will let him explain it further though.

[sicksubie]

Originally Posted by TomsSVX

I am convinced the bypass valve is supplying more boost too early than the ECU is meant to read. That is why I am seeing 13 value AFR's and timing pulling back up to 10 degrees So like I said, it is a mechanical issue, not really a software issue unless I wanted full boost at 1/2 throttle

Tom

Why are you on at 10:40 AM??? Get back to corrupting the kids

[TomsSVX]

grumble grumble.... murder.... grumble... damn homeroom.... grumble

Tom

[cdigerlando]

Originally Posted by TomsSVX

I am convinced the bypass valve is supplying more boost too early than the ECU is meant to read. That is why I am seeing 13 value AFR's and timing pulling back up to 10 degrees So like I said, it is a mechanical issue, not really a software issue unless I wanted full boost at 1/2 throttle

Tom

????? Don't you want boost early? Hence the supercharger. Maybe Mike can tune your car for you. If you ever want to do that, I live in Orlando and have a guest room you could stay in. There is even a 4 wheel dyno that can be rented for about $750 per day. We actually got a few of us together and hired a tuner for our Imprezas.

Hopefully Mike will get to tuning his car with the built motor and the supercharger, then he could just flash your ECU with the new map. Getting this car squared away is a pain huh?