ZillaMotorsports strikes again. Jr3800 Update Page 5
03-03-2007, 11:59 AM
#71
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EK98'* ports are identical to jr's3800'* and Mike1995'* in size, as well as those on the Zilla (93 SSEi).
That being said, MEASURE 99 times, cut a little, measure, cut, measure, cut. Port-port spacing is just as important as port size. Do NOT use the old gasket or even a new one as a guide.
That being said, MEASURE 99 times, cut a little, measure, cut, measure, cut. Port-port spacing is just as important as port size. Do NOT use the old gasket or even a new one as a guide.
03-03-2007, 03:54 PM
#73
Retired
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Only takes a speck of dirt to throw a casting mold off specs. Hence the reason you need to measure each individual LIM port and cylinder head port to achieve best results.
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03-03-2007, 05:51 PM
#74
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Originally Posted by jr's3800
The car is a different animal, The power comes on in a smooth manner, it doesn't seem peaky, as in dead early on and better in the mid to high range... It pulls good and strong from the word go and continues up the rev band.. Not to mention it revs sooo easy now.. Its amazing to see how an intake maifold casting could rob a 3800 of sooo much... Often times I have wondered if GM held the 3800 L36 back a little... Its nice to not have an TQ management well..
While reading this I'm thinking about the way this engine operates, it pulls a lot of vac at low rpm and the more you step on the gas, it pulls less vac.
By having a smooth port it allows more air to enter freely. With the continious curve of the port the air is able to grab the surface of the intake with less turbulance and travel down the port faster and freeier. This is allowing you to realize more low end torque, and at that low RPM, its not HP of course but you can surly feel the torque.
Now.... While you increase rpm'* the free air gains are falling off but still you have to be gaining a good 15% free air flow and this is most likely why you don't feel the typical pull as you roll into the mid rpms. so its probabely a wash. As long as your not taking on any losses, its all god.
Now thinking about rolling into the higher rpms, one thing you have done is added more air while the MAF sensor is reading the same data it did before, that means the injectors are pumping out the same old pulse rate. Now you have leaned ot the A/F a bit, not dangerous at all because GM likes them so stinking pig rich.
So maybe when you are at WOT you went from a hefty 10.4 to a happier 10.8 or 10.9 A/F so you are feeling more pull on the top end.
I think you guys did a really good job.
That'* all that came to mind.
03-05-2007, 09:50 PM
#75
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Time for an Update...
Myself and Mike met up to do the lower intake work on my car...
These are older pics, but this is what we started with..
One problem we found when we removed the intake and looked at the stove pipe... We found that the Dorman with the Factory stove pipe was slowly melting the intake...
Wasn't bad but we found what we didn't want to see..
We cleaned up the upper intake and this is what the roof of the upper looks like if you have an L36...
We got side tracked and decided to add some Pioneers to Mikes car...
Going from stock GM Delco to Pioneers.... What an improvement...
After Lunch, we finally installed the lower intake.. Popped the aluminum gaskets in...
Notice the Aluminum gaskets.... Yay...
The ports on the new intake
Reinstalling the upper intake.. Notice that the stove pipe doesn't line up...
Happy updates to give too...
In driving the car and letting the Puter learn... The car is running better and better... 2nd gear pull is more than I have ever had with this car.. First pulls better from 2000 Rpms on... The top of first into second leaves me with a more violent shift( Maybe not quite the right word, Not violent but noticeable )... Today being that the car had a few miles under it after installing the new Comp Cam lifters.... Got them nice and quiet... Made a run with a friend to the Parts store and had to inhale some smoke... Doing the burnout was more fun than ever... I think I need stickier tires...lol... I would do this again.. And I would recomend it in a hurry...
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Myself and Mike met up to do the lower intake work on my car...
These are older pics, but this is what we started with..
One problem we found when we removed the intake and looked at the stove pipe... We found that the Dorman with the Factory stove pipe was slowly melting the intake...
Wasn't bad but we found what we didn't want to see..
We cleaned up the upper intake and this is what the roof of the upper looks like if you have an L36...
We got side tracked and decided to add some Pioneers to Mikes car...
Going from stock GM Delco to Pioneers.... What an improvement...
After Lunch, we finally installed the lower intake.. Popped the aluminum gaskets in...
Notice the Aluminum gaskets.... Yay...
The ports on the new intake
Reinstalling the upper intake.. Notice that the stove pipe doesn't line up...
Happy updates to give too...
In driving the car and letting the Puter learn... The car is running better and better... 2nd gear pull is more than I have ever had with this car.. First pulls better from 2000 Rpms on... The top of first into second leaves me with a more violent shift( Maybe not quite the right word, Not violent but noticeable )... Today being that the car had a few miles under it after installing the new Comp Cam lifters.... Got them nice and quiet... Made a run with a friend to the Parts store and had to inhale some smoke... Doing the burnout was more fun than ever... I think I need stickier tires...lol... I would do this again.. And I would recomend it in a hurry...
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03-06-2007, 02:12 AM
#77
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i've been watching this topic from the start and all i have to say is Good job guys. I'm eager to give this a shot myself. Just gotta get the right tools.
James
James
03-06-2007, 10:51 AM
#79
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Keep in mind the two test cars are both 1995 L36'*. There is very little torque-management in those PCM'* when compared to the 96 and newer L36 PCM'*. We don't know how a newer car will respond, and what the PCM may do to that new-found low end grunt. Should still be very free-revving, and obvious gains in the midrange.
I'd expect you'll feel the same results overall, but the newer PCM'* may rob you of just a little at the bottom end.
I'd expect you'll feel the same results overall, but the newer PCM'* may rob you of just a little at the bottom end.
03-06-2007, 11:19 AM
#80
DINOSAURUS BOOSTUS
Expert Gearhead
Having a TM'd car, my thoughts are that the 96+ will respond and also work out well. TM doesn't pull back the reigns much until you start spinning the tires. Therefore if they didn't beat the car senseless each time they started it....should see the gains.