Project Hstig to Hstiger - dyno sheet on P19

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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Thu Feb 13, 2014 11:45 am

Hstig wrote:
ClemSt wrote:
Rascal69 wrote:So did you guys figure out what was wrong with the Forged motor?

Great to hear the car is alive again.


+1 would like to know what caused the block to crack as the car ran for a while then it started giving issues?ANything other guys should look out for?

What I think happened, but it is all speculation, is that with the delamination of the first gasket, the car overheated slightly which may have caused the block and sleeves to seperate due to different expansion rates. Initially it may have been a miniscule seperation which was not detected and could have gotten progressively worse over time to the end result seen here.


Correct, appears the block has expanded around the sleeve, meaning the tight tolerances machined for the darton fitment were no longer right and the coolant bypassed around the sleeve into the sump.

Remember the Dartons are farking hard metal and they have a very different expansion ratio to the aluminium block, similar to how a sleeve drops except this time the block expanded in a way that left a leak but no dropped sleeve.

So I think machining was good, but the overheating from the blown gasket etc may have caused the damage in long run.

Was able to clearly see the water weep out around the bottom of the sleeve on cyl 1 with the sump off with an ice cold motor.

Under 1.4bar of water pressure and at operating temp I can imagine how quickly that water disappeared into the sump.

So as time went on it got progressively worse until it was a very bad leak.

Sleeves are not cracked, nor is any of the pistons, rods etc damaged.

You would need to remove the sleeves and fit them to another block though to reuse them, something Frans wasn't comfortable with I believe hence the RS motor.

So that's my opinion and having spoken to ICRed about the forged darton GTR builds, they have experienced a similar issue when the motors overheat.
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby Hstig » Thu Feb 13, 2014 11:48 am

Thanks Polony, yip, did not have the guts to transfer the stuff to a new block

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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby frozen225 » Thu Feb 13, 2014 11:55 am

Very expensive school fees for the rest to benefit.

Not sure of thanks is the right thing to say :?
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Thu Feb 13, 2014 1:43 pm

frozen225 wrote:Very expensive school fees for the rest to benefit.

Not sure of thanks is the right thing to say :?


And why is thanks the wrong thing to say?

Thought I gave a good enough explanation of our findings
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby Stitch » Thu Feb 13, 2014 1:45 pm

PoLonY wrote:
frozen225 wrote:Very expensive school fees for the rest to benefit.

Not sure of thanks is the right thing to say :?


And why is thanks the wrong thing to say?

Thought I gave a good enough explanation of our findings


you don't understand what he meant...
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby ash » Thu Feb 13, 2014 1:48 pm

Hstig wrote:Thanks Polony, yip, did not have the guts to transfer the stuff to a new block

frans, you are welcome to send the Rods and pistons my way! i will put them to good use? :lol:

on a serious note, if you do not have a buyer as yet, let me know what you are looking at for the pistons and rods.

TX
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Thu Feb 13, 2014 1:52 pm

Stitch wrote:
PoLonY wrote:
frozen225 wrote:Very expensive school fees for the rest to benefit.

Not sure of thanks is the right thing to say :?


And why is thanks the wrong thing to say?

Thought I gave a good enough explanation of our findings


you don't understand what he meant...


clearly not
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby Hstig » Thu Feb 13, 2014 1:57 pm

ash wrote:
Hstig wrote:Thanks Polony, yip, did not have the guts to transfer the stuff to a new block

frans, you are welcome to send the Rods and pistons my way! i will put them to good use? :lol:

on a serious note, if you do not have a buyer as yet, let me know what you are looking at for the pistons and rods.

TX

I have an interested party for the whole old motor, but if that falls through then I'll post up the parts for sale

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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby Hstig » Thu Feb 13, 2014 2:07 pm

I think frozen means thanks for posting all the information and the suspected cause, but because it was such an expensive lesson, he is not sure if he should be thanking me or holding me while I cry LOL

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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Thu Feb 13, 2014 2:24 pm

Hstig wrote:I think frozen means thanks for posting all the information and the suspected cause, but because it was such an expensive lesson, he is not sure if he should be thanking me or holding me while I cry LOL


Oh I see haha
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby frozen225 » Thu Feb 13, 2014 2:35 pm

PoLonY wrote:
Hstig wrote:I think frozen means thanks for posting all the information and the suspected cause, but because it was such an expensive lesson, he is not sure if he should be thanking me or holding me while I cry LOL


Oh I see haha


Thanks HSTig

I am okay saying it now :lol:
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Thu Feb 13, 2014 2:37 pm

frozen225 wrote:
PoLonY wrote:
Hstig wrote:I think frozen means thanks for posting all the information and the suspected cause, but because it was such an expensive lesson, he is not sure if he should be thanking me or holding me while I cry LOL


Oh I see haha


Thanks HSTig

I am okay saying it now :lol:

:lol:
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Tue Feb 18, 2014 8:32 am

So all is going well Frans?
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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby Hstig » Tue Feb 18, 2014 9:37 am

The engine is in and has survived the trip back to C/ville unscathed. There are no leaks thus far and all is clear in the oil and the coolant. All I need now is an updated map from Shaun later this week. Keeping out boost for now till the map is sorted, but the car feels great.
Thanks to Deon and Strat from ACT, and also a big thanks for Hano for the thermal gasket. Thanks also to Shaun for helping out with the map

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Re: Project Hstig to Hstiger - dyno sheet on P19

Postby PoLonY » Tue Feb 18, 2014 11:03 am

Good to hear bud :)
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