Titanium valve spring retainers!!! - Club4G Forum : Mitsubishi Eclipse 4G Forums - 2006-2012 Eclipse Authority
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4G Eclipse GS/SE Specific 2.4L I4 (4G69) Specific Forum


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Old May 1st, 2020, 07:15 PM   #1 (permalink)
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Titanium valve spring retainers!!!

I ordered some titanium spring retainers that are meant for a 2jz beehive style spring that happened to measure EXACT to the 4g69 spring. I will post pictures as soon as I get them in!
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Old May 1st, 2020, 09:11 PM   #2 (permalink)
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Awesome!

I think 5L springs for a foxbody are our size too
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Old May 2nd, 2020, 12:54 AM   #3 (permalink)
140whp+15.72%= 162hp
 
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Those good for NA? How much were they?
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Old May 2nd, 2020, 09:19 AM   #4 (permalink)
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Pretty useless NA unless you also have a built high compression destroked block, port the head, run a wild intake manifold, and aggressive cam.

Titanium is good for revving past 8700rpm, and extreme temperatures as they won't resonate until about 22,000rpm, and survive a lot of heat.
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Old May 2nd, 2020, 09:06 PM   #5 (permalink)
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Quote:
Originally Posted by Sabertooth^2 View Post
Pretty useless NA unless you also have a built high compression destroked block, port the head, run a wild intake manifold, and aggressive cam.

Titanium is good for revving past 8700rpm, and extreme temperatures as they won't resonate until about 22,000rpm, and survive a lot of heat.
My reason for the purchase is just to high rev my almost new ralliart head once in a blue moon. I got them for a good deal and am in the process off a head rebuild with new springs and valves.

My mods will be
Dc sports CAI
Gt tb
440cc injectors
Outlander p&p intake manifold
P&p head w cam#H (ralliart, outlander)
Rrm headers
Magnaflow catback
E85 tune

Last edited by MrRalliart09; May 3rd, 2020 at 08:55 AM.
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Old May 3rd, 2020, 08:58 AM   #6 (permalink)
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How high are you planning? The rods are gonna be your weak point, as at 8000rpm, we have 28m/s piston speeds.

Also, invest in a different intake manifold. 4G69 ones are a huge restriction up top, a 4G63 one should raise your powerband up a bit past 7000rpm without the cam.


Stock head, I regularly wind out to 7800rpm. Power falls off after 7500 on my setup it seems, so the other 300rpm is breathing room. Stock springs are 65lb springs, and work well.with the stock cam in that range. You won't want to shift the power and much higher, or you'll need lightweight pistons to go with upgraded rods and bearings. The risk of sending a piston through the motor goes up significantly as rpm rises. You could invest in a long rod build using 156mm rods, and a 4G64 block to help though. It'll make it much safer.
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Old May 3rd, 2020, 10:51 AM   #7 (permalink)
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Quote:
Originally Posted by Sparda D'Mon View Post
Those good for NA? How much were they?
They were about $200 for 16
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Old May 3rd, 2020, 01:48 PM   #8 (permalink)
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Quote:
Originally Posted by Sabertooth^2 View Post
How high are you planning? The rods are gonna be your weak point, as at 8000rpm, we have 28m/s piston speeds.

Also, invest in a different intake manifold. 4G69 ones are a huge restriction up top, a 4G63 one should raise your powerband up a bit past 7000rpm without the cam.


Stock head, I regularly wind out to 7800rpm. Power falls off after 7500 on my setup it seems, so the other 300rpm is breathing room. Stock springs are 65lb springs, and work well.with the stock cam in that range. You won't want to shift the power and much higher, or you'll need lightweight pistons to go with upgraded rods and bearings. The risk of sending a piston through the motor goes up significantly as rpm rises. You could invest in a long rod build using 156mm rods, and a 4G64 block to help though. It'll make it much safer.
I do have bearings and arp rod bolts but you're saying the stock rods can't take high rev?
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Old May 3rd, 2020, 04:54 PM   #9 (permalink)
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Absolutely. They are super thin rods, and the rod ratio is low
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Old May 3rd, 2020, 06:37 PM   #10 (permalink)
140whp+15.72%= 162hp
 
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Name: Richard.
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Sweet! Any other parts known to fit our 4G69 from the awesome 2JZ?
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