1G Another engine build ...

[SasaniFab]

I’m wrapping up another engine build for a friend who destroyed the last motor I built because he didn’t listen and shut off the knock sensor in ecmlink. Needless to say an injector wasn’t up to snuff and he destroyed two pistons. The engine made mid 500 who knocking like a diesel. He plans to keep this conservative and in one piece for the foreseeable future. I use the same specs on all of my motors as I’ve had great luck. I have the block sent out to be decked, When I get it back I clean out every thread and blow them out thoroughly. Most important the head and mains. I use a two step process for measuring, I always make sure everything is at room temperature when doing this as I’ve had issues in the winter when a crank had been sitting outside in the garage. I mic and dial bore gauge everything and come back and verify with plastigauge. All of the cranks I’ve used have been at the end of spec .003 or so after polishing. The ptw clearances I keep at .004-.0045 with Wiseco hds , this motor has wiseco hds with eagle rods with 625 rod bolts. For the ring gap I shoot for .022 top .02/3 bottom. I’ve noticed with a .0045 ptw clearance the compression ring is basically to spec with some minor massaging. As far as the head , I torque the head down to 105-110 ftlbs with arps. I load the washers first then install the studs with a ratchet , I torque them tight so they seat 100% and loosen them and torque them back hand tight. I Install the studs dry, if you cleaned the block appropriately when you install the studs in the block oil won’t seep out Onto the deck surface..... I hate that! Before you install the timing belt make sure you fill the engine with oil and spin the oil pump gear to prime the motor prior to starting it. I usually run 5 quarts of cheap oil through. Think that about covers it ...

 

[SasaniFab]

Pics

 

[AWD-Tony]

My block is at the machine shop and when I dropped the pistons off (Wiseco hd) the spec sheet said .003xx for ptw clearance. Just curious why you go wider?

 

[jed344]

Wiseco will tell you for xx amount of HP or boost to widen PTW by xxx. I run .0045 myself as well on wiseco HD.

 

[1990TSIAWDTALON]

We share alot of techniques. I love your builds since it reminds me of mine but I'm not doing it.
Post up all relevant material for others to use if they have questions and of course, end results.
Your friend is lucky you are around. My 7 bolt build should bust off this weekend if all goes well. Crossing fingers!

 

[SasaniFab]

My block is at the machine shop and when I dropped the pistons off (Wiseco hd) the spec sheet said .003xx for ptw clearance. Just curious why you go wider?

The motors I’m building are seeing upwards of 800 horsepower. That number was recommended to me by someone awhile back and I’ve been using it ever since , I’m sure .003 would be fine unless your going for huge power in which case I’d open it up a little bit. This will be the 6th motor I’ve built , all of them had perfect compression and didn’t smoke so ....

 

[SasaniFab]

We share alot of techniques. I love your builds since it reminds me of mine but I'm not doing it.
Post up all relevant material for others to use if they have questions and of course, end results.
Your friend is lucky you are around. My 7 bolt build should bust off this weekend if all goes well. Crossing fingers!

I will be starting my 2.1 destroker aluminum rod setup here shortly. Can’t wait to get it In the car.

 

[1990TSIAWDTALON]

My block is at the machine shop and when I dropped the pistons off (Wiseco hd) the spec sheet said .003xx for ptw clearance. Just curious why you go wider?

High boost thermal expansion of the pistons Tony. I am running .005-.006 depending on which cylinder we talk about.

 

[AWD-Tony]

The motors I’m building are seeing upwards of 800 horsepower. That number was recommended to me by someone awhile back and I’ve been using it ever since , I’m sure .003 would be fine unless your going for huge power in which case I’d open it up a little bit. This will be the 6th motor I’ve built , all of them had perfect compression and didn’t smoke so ....

I’ll be just over 400whp until I get tired of the 68hta. Not sure when but I know eventually I’ll want between 5-600awhp. So would .003xx be okay or should I go with .0045?

 

[SasaniFab]

I’ll be just over 400whp until I get tired of the 68hta. Not sure when but I know eventually I’ll want between 5-600awhp. So would .003xx be okay or should I go with .0045?

I’ve never had any issue with .0045. If u want room to grow you might wanna consider it

 

[AWD-Tony]

I’ve never had any issue with .0045. If u want room to grow you might wanna consider it

Gotcha. Thank man!!

 

[jed344]

.0045 in my experience works well. On cold days may hear a little piston slap for first 10-20 seconds. After that dead silent and zero smoke. I usually as well go .021-.022 top ring and .024 second ring. Motors should have no issues seeing 700+whp.

 

[AWD-Tony]

Good news. Dropped off main studs yesterday and he only cleaned the block so told him to go .0045 for ptw clearance. Thanks guys!!

 

[SasaniFab]

Good news. Dropped off main studs yesterday and he only cleaned the block so told him to go .0045 for ptw clearance. Thanks guys!!

Keep us updated

 

[AWD-Tony]

Keep us updated

Will do

 

[steve]

If your using a "seasoned" crank, don't forget to clean everything out of the crank oil passages.

 

[AWD-Tony]

If your using a "seasoned" crank, don't forget to clean everything out of the crank oil passages.

I will. Thanks Steve!

 

[SasaniFab]

Another build in the books boys

 

[AWD-Tony]

Question. Plastigauged the mains and they’re all .002 except for #4 which tappers from .001 -.002. Your thoughts? I accidentally torqued to 62ftlbs on the first nut so just finished all of them at 62ftlbs so.

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[SasaniFab]

Question. Plastigauged the mains and they’re all .002 except for #4 which tappers from .001 -.002. Your thoughts? I accidentally torqued to 62ftlbs on the first nut so just finished all of them at 62ftlbs so.
Was that crank machined? I’d try switching out some bearing shells to get relax that taper, order another box if you have too

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[AWD-Tony]

Crank was polished only. These are the old bearings. I’m going to check that journal for taper.

What do you mean by shell?

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[SasaniFab]

Crank was polished only. These are the old bearings. I’m going to check that journal for taper.

What do you mean by shell?

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Mix and match the bearing half’s , it could help with some of the taper. Did you mic the crank ?

 

[AWD-Tony]

Mix and match the bearing half’s , it could help with some of the taper. Did you mic the crank ?

Not yet. I’ll do it after work

 

[AWD-Tony]

Mix and match the bearing half’s , it could help with some of the taper. Did you mic the crank ?

Yeah that journal is slightly tapered. I don’t think swapping bearing halves will work in my situation. Oil clearance is still within limit so think I’m going to roll with it. What do you think?

 

[SasaniFab]

What are the values when you put a mic on it?