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dale
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Jan 28, 2013 12:07 pm 
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+1 on the above, that statement is 100% true.
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Gary ST165
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Jan 28, 2013 6:57 pm 
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Diceman wrote:
Jeff - Is this a headlift issue the L19 is supposed to overcome?



jeffrosie6 wrote:
Yes, supposed to.
But do 3SGTE's suffer from headlift, and at what boost pressure is this likely to happen?



from: http://www.gt4oc.net/forums/viewtopic.p ... 9#p1330667

phil-p wrote:
Same i stretched stock ARP head stoods on mine running 1.8bar and 400+bhp. I then changed to L19 (expensive but the only way to go IMO when building a high powered 3sgte) Then the block cracked after 16k.

What size, thickness are the head stoods on the other engines? IIRC the 3sgte are smaller than a few other engines and raceeng make a thicker head stood to stop them stretching but you need to get the block and head machined for them. But this also takes material away from the block around the head stood behind the water pump making that the next week link.

L19 FTW imo

Phil

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dale
 Post subject: Re: L19 Head Bolts
PostPosted: Tue Jan 29, 2013 1:01 pm 
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its interesting that not all seem to have this problem, we havent, martin hasnt, some have... didnt phil build his own engine if i remember correctly?

Not saying he was wrong as he has far more balls and bravery than i would to build my own engine but just looking toward like said previous
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two_OH_five
 Post subject: Re: L19 Head Bolts
PostPosted: Tue Jan 29, 2013 1:18 pm 
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IIRC mrbarry also thought he had head lift many moons ago. I don't recall if that was ever positively identified

At the end of the day there are many unknowns. How's many people have flatness and surface finish reports for the head/block machining work? How many have unsuspectingly bought fake bolts off egay? Etcetera etcetera

For peace of mind fit L19 bolts. In the grand scheme they aren't that expensive

Or wait and see how Don's engine turns out. Results should be available this decade :mrgreen:
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jeffrosie6
 Post subject: Re: L19 Head Bolts
PostPosted: Wed Jan 30, 2013 12:10 am 
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I'm currently running 1.6bar and putting out about 520brake at 1.6bar. Wonder how much I'll make at 2bar ;)

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98 Celica GT4 ST205
Full forged rebuild with Wiesco pistons, Crower rods, mildly ported head, 264/272 HKS cams, FMIC, PFC Pro, GT35 BB turbo, turbo back 3" system.
Currently running 1.6bar/520+bhp
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martinking6
 Post subject: Re: L19 Head Bolts
PostPosted: Wed Jan 30, 2013 12:24 am 
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I have actually bought L19 studs for my build so am a bit of a hypocrite saying there not needed :lol: but I havnt experienced any issues with head lift or head gasket failure up to yet using stock arp`s , I have got L19`s for mine because am not sure what sort of power I am looking to in the future so setting everything ready and in place incase

Martin
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jeffrosie6
 Post subject: Re: L19 Head Bolts
PostPosted: Wed Jan 30, 2013 1:03 am 
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Well, I built the engine myself. I'm not what you would call an expert, but I'm fairly good in engineering and am confident in my ablities. I'll take it up in small stages - 1.8bar and if all is ok then 2bar :)

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98 Celica GT4 ST205
Full forged rebuild with Wiesco pistons, Crower rods, mildly ported head, 264/272 HKS cams, FMIC, PFC Pro, GT35 BB turbo, turbo back 3" system.
Currently running 1.6bar/520+bhp
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TrackToyFour
 Post subject: Re: L19 Head Bolts
PostPosted: Wed Jan 30, 2013 1:13 am 
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two_OH_five wrote:
Or wait and see how Don's engine turns out. Results should be available this decade :mrgreen:
:shock:

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two_OH_five
 Post subject: Re: L19 Head Bolts
PostPosted: Wed Jan 30, 2013 9:55 pm 
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TrackToyFour wrote:
two_OH_five wrote:
Or wait and see how Don's engine turns out. Results should be available this decade :mrgreen:
:shock:


Well, I was trying to be optimistic but you're right......

**Might be available** :lol: :mrgreen:


Aaaaaaaannd RUN
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jeffrosie6
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Feb 11, 2013 1:03 am 
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At the moment, designing a side feed inlet manifold. Going to use the lower section from a ST202 - pipes that bolt to the head, and design a plenum to work with it.

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98 Celica GT4 ST205
Full forged rebuild with Wiesco pistons, Crower rods, mildly ported head, 264/272 HKS cams, FMIC, PFC Pro, GT35 BB turbo, turbo back 3" system.
Currently running 1.6bar/520+bhp
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two_OH_five
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Feb 11, 2013 1:35 am 
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Are you planning to use the butterfliesflie for throttle?
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jeffrosie6
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Feb 11, 2013 2:43 am 
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No, the 202 runners don't have butterflies. I'll be using a 80mm billet throttlebody.

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98 Celica GT4 ST205
Full forged rebuild with Wiesco pistons, Crower rods, mildly ported head, 264/272 HKS cams, FMIC, PFC Pro, GT35 BB turbo, turbo back 3" system.
Currently running 1.6bar/520+bhp
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two_OH_five
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Feb 11, 2013 10:46 am 
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It depends which branch of the 202 manifold you are planning to use

You are correct that the front plenum doesn't have them. However the top plenum which has no external air feed is connected via butterflies
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jeffrosie6
 Post subject: Re: L19 Head Bolts
PostPosted: Mon Feb 11, 2013 11:28 pm 
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Thats right. Did'nt think about that!
Wonder if that could be used as trottle butterflies???

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98 Celica GT4 ST205
Full forged rebuild with Wiesco pistons, Crower rods, mildly ported head, 264/272 HKS cams, FMIC, PFC Pro, GT35 BB turbo, turbo back 3" system.
Currently running 1.6bar/520+bhp
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