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Old 04-23-18, 12:10AM   #1
steve
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Default softening chambers

Anybody know details about softening chambers on Tiger heads. It seems like I can't keep a head gasket or piston to last. I am trying to compete in the Virginia Fastest Street Car list and I am fast enough but don't last long enough!!!!

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Old 04-23-18, 02:28AM   #2
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I can tell you this, the E-Heads I sold had the chambers soften, comparing them to ones that haven’t been softened, it just apears to me that all that was done all the sharp edges were really smooth over. Only difference I can tell. Other then that couldn’t see much difference.

The new E-heads I have...have the fast burn chambers. Just from what I’ve been hearing the Tigers have issues running nitrous with the chambers they have. SikGoat ran them and had issues running nitrous, maybe he can help you out.

PS: word is...it’s not a nitrous freindly Head
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Old 04-23-18, 09:29AM   #3
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I remember seeing where guys put the inserts between cylinders on tigers for gasket sealing. I am sure someone will be able to help here as Gach said.

Where are the gaskets going bad?
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Old 04-23-18, 04:20PM   #4
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Originally Posted by JSPONT View Post
I remember seeing where guys put the inserts between cylinders on tigers for gasket sealing.
When we ran Tigers they had O-rings and Copper gaskets and water fed ti the centers. After 3 runs one of them would have melted between 3&5 or 4&6. The casting were just to soft. I have heard of a couple guys putting those inserts in and having SOME luck.
We just went back to the E-heads and never hurt those. (killed many a piston though lol)
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Old 04-23-18, 11:26PM   #5
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I'm not hurting the head itself. Burning the center head gasket (3-5 & 4-6) and lifted a few ring lands. I need to figure this out. Maybe a new set of heads.
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Old 04-23-18, 11:40PM   #6
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I take it your not spraying. But lifting head gaskets. Just curious how much compression you running not that that would be the cause.
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Old 04-23-18, 11:44PM   #7
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I'm not hurting the head itself. Burning the center head gasket (3-5 & 4-6) and lifted a few ring lands. I need to figure this out. Maybe a new set of heads.
Those inserts helped that if you are not spraying as Billy said. Keep us posted, I know posting bad stuff sucks, but we still can all learn. Good luck.
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Old 04-24-18, 12:18AM   #8
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We could talk about Heads gaskets...head studs bah bah... but if the heads are soft not much is going to help. Not even inserts.
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Old 04-24-18, 12:33AM   #9
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Have a friend running nostalgia super stock with us had terrible luck holding head gaskets with his tigers also. Only 13:1 and NA. They are also soft. Not impressed. Wish he’d never bought them. Nothing but issues. So disappointed that the cars been sitting almost a year.
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Old 04-24-18, 01:56AM   #10
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It pains us all to hear this. Heads are a big investment.
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Old 04-24-18, 02:43AM   #11
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Default A356-T6 cast alloy

356-T6 aluminum:It all depends on the process and how tight the controls on it are.
https://www.makeitfrom.com/material-...Cast-Aluminum/
Pay attention to the thermal properties section.

More Info
https://digitalcommons.wpi.edu/cgi/v...gineering-pubs

Give it time to load.
Lots more info out there and


Burning through the cylinder head gasket area on the inboard cylinders where the exhaust ports/exhaust valves are paired and the peak heat is at its highest and retained longer.Push It hard enough & Something is gonna give eventually.
Are the EGT's for each cylinder being recorded during a run?
Inboard cylinder pressures/temps could be spiking beyond safe limits in that structural area of that particular head casting given the stock gasket clamping arrangement is being used?
Especially w/larger bores/stock bore spacing where gasket space between cyls is minimized.
The Dirty Bird crew had to add additional head bolts to their Tigers because of head gasket sealing problems. They were blown alcohol funny car .

Could be a structural stiffness problem in that specific area that has been addressed in a later release?
Thought there was supposed to be a "Tiger II" already out or on the way?
The E/I-E/I-E/I-E/I layout would take away the hot spot and be the better way to go.
But that is a different cam & headers& intake to make that package work.

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If It Doesn't Break: Make It Lighter
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Old 04-24-18, 03:21AM   #12
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MLS vs Copper vs composite vs NO GASKET

http://www.enginelabs.com/engine-tec...ls-and-copper/
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Old 04-24-18, 12:36PM   #13
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My friend has tried both Cometics and SCE copper. Neither has worked. Has to have them decked each time also as the gaskets keep indenting the head surface. Soft.
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Last edited by Hooter : 04-24-18 at 01:11PM.
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Old 04-24-18, 01:27PM   #14
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My friend has tried both Cometics and SCE copper. Neither has worked. Has to have them decked each time also as the gaskets keep indenting the head surface. Soft.
WOW!
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Old 04-24-18, 08:00PM   #15
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Quote:
Originally Posted by Gach View Post
I can tell you this, the E-Heads I sold had the chambers soften, comparing them to ones that haven’t been softened, it just apears to me that all that was done all the sharp edges were really smooth over. Only difference I can tell. Other then that couldn’t see much difference.
This is a softened chamber

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