Import "Hotrodding" - boosted 1.8L Build

I did have a few hours today and mocked up the first part of the exhaust. 3" V-band stepped to 4". To finish the exhaust, I first have to build the tubular bumper and fender supports then bolt the bumper/fender on so I can accurately place the hole in the fender for the exhaust.

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do they have alot of clutches to offer now? i'd assume the aftermarket for those is still somewhat slim. Looks good, a bit baller overkill (turbo/exhaust) but sweet nonetheless.

PS are you using that size exhaust scroll???? looks huge! doesnt add up with a small wastegate...
 
Yes this car used to go to the Redline meets a few times. A lot has changed since then.

There are several clutches available. Spec, Competition CLutch, ACT Clutches. My choice is Competition Clutch at this point.

The turbo is perfect for 400hp on this motor. And a 38mm wastegate is better suited because it takes more exhaust gases to spool the turbo on this engine then a larger displacement engine, so less gas needs to be vented. It's a common misconception that the more HP, the bigger the wastegate. It all depends on how much total air is need to spin the turbo at the desired PSI. A much larger displacement engine would require a larger wastegate with the same turbo because less air is needed to spin the turbo on the larger engine.

The turbine is a T3. I forget the mm and A/R at the moment. It's not that big. This is a built motor 400-500whp built. This Turbo may not even get me to 400whp. We shall see. Exhaust is a side exit drag pipe. Right out the bumper. The step to 4" might be a little overkill at the moment. But a lot of this build is being built for down the road goals. Like the exhaust pipe. But it won't be once I exceed my goals. I am used to the 4" pipe now and even think 3" looks tiny at times lol
 
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-Kevo- said:
And a 38mm wastegate is better suited because it takes more exhaust gases to spool the turbo on this engine then a larger displacement engine, so less gas needs to be vented. It's a common misconception that the more HP, the bigger the wastegate. It all depends on how much total air is need to spin the turbo at the desired PSI. A much larger displacement engine would require a larger wastegate with the same turbo because less air is needed to spin the turbo on the larger engine.
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It wasnt a misconception, it was the fact that once you achieve the full potential of the turbo chances are the 38mm wastgate will not handle the flow to keep the boost down. Its simple physics. plus off the top of my head 2.5 inch pipe flows near 1000cfm so that means you'll have an exhaust that is way overkill for such a small boosted motor. But that is purely for the baller status :)
 
I am...when time permits lol

MystryGuy said:
It wasnt a misconception, it was the fact that once you achieve the full potential of the turbo chances are the 38mm wastgate will not handle the flow to keep the boost down. Its simple physics. plus off the top of my head 2.5 inch pipe flows near 1000cfm so that means you'll have an exhaust that is way overkill for such a small boosted motor. But that is purely for the baller status :)
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Reaching the full potential of the turbo will be at high boost, thus needing to vent less gas, especially the larger the turbine wheel, the more gas it takes to spin it. If I was only planning on running 10psi with this turbo, then I would need a larger WG, but this is a high boost build and the 38mm will work just fine for this setup. The 4" is overkill at this point for sure, not the 3" though. I would never run a 2.5" dump pipe on this turbo that's for sure. Especially since we measure the flow rate by the inside diameter, not outside. 3" o.d. exhaust is perfect, 4" is a little excessive yes, but I like the extra room lol
 
Time for an update. Nothing spectacular yet like some of the other epic builds around here, but progress is progress.

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I need to drop all my aluminum off for welding and a few other parts needing to be Tig'd. Cage fabrication should start this weekend now that the seat is figured out.
 
Oh yes. They'll be boxed in actually. You can see a whole stack of bottom plates in the pic. The main hoop was just sitting in there for test fitting purposes.
 
ok i see them now.. they are on the opposite side of the pic. I'm not big on foreign cars but safety is everyone's concern.
 
A few more pics of cage progress awhile ago. Got half the cage in. Still have 4 more bars to add. Then gussets/boxes etc hopefully this weekend. Can't wait for the holidays to pass...

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