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| Project 3400 Roller Cam Block (Page 80/82) |
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La fiera
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JUN 28, 10:47 PM
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| quote | Originally posted by lou_dias:
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Look at this dyno and here are the specs.
-3500/3400 hybrid
-12.4:1 Compression ratio
-WOT-Tech Street/Strip cam
-Aluminum Heads
-65MM TB
Build by WOT-Tech itself.
This is the cream of the pie right here. How come an overbore 3400 can make more power with Iron Heads than the almighty aluminum heads with a huge 65mmTB and way more compression.[This message has been edited by La fiera (edited 06-28-2024).]
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La fiera
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JUN 28, 10:50 PM
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. [This message has been edited by La fiera (edited 06-28-2024).]
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lou_dias
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JUN 29, 11:10 AM
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I'm not quite done making power yet. I believe we added a degree of timing broadly but since I'm still on 93 octane with an octane booster, it may have been too much at ~5200 rpm where it loses a bunch of power. I'll have to back off until I switch to E85...but as I said, it was almost 8pm and I hadn't had dinner and needed to go.
I also still have a 2.25" exhaust near the muffler...where it was 2.5" from the collector to that point. I think that's what may be causing the uneven pulsing once the exhaust pressure builds up and is preventing the cam from scavenging. That's *my* theory anyways... On the street, vacuum pressure behind the car as it moves forward may alleviate that somewhat.
Unfortunately, getting things fixed has been somewhat slow. Worked on my boat for a week and now I can enjoy the rest of the summer with it finally between racing events.
I have a race today. I am going to work on my launch as a much lower drop-clutch RPM. I'm one of the few people still using manual transmissions. Almost everybody's switched to 2-step setups. It's still fun for me. I hate autos.
If you roughly multiply the speed by 45, you'll get the approximate rpm in the graph. My thick wires prevent a good rpm reading once they get hot.[This message has been edited by lou_dias (edited 06-29-2024).]
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lou_dias
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JUN 29, 08:23 PM
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This morning, I spent some time pulling timing from 5200+ .. about 1.5 degrees. No dyno but...
Round 1
https://rumble.com/v54kruk-...-audi-6-29-2024.html
Round 2
https://rumble.com/v54kszt-...maro-06-29-2024.html
I don't think I would have beaten that Audi last week. I think I picked up some more power up top.
In the 2nd race... Good driver, we were sliding to the outside coming out of turn 2 and I realized my foot wasn't to the floor yet so I punched it just as we were coming out of turn 2 and just about pulled up beside him...
I'll have to study the video better because I'm not sure what happened...body roll back may have made my left front fender rub the tire...
I probably should have backed off and cut to the inside and then gunned it as I think I could have beat him to turn 3 or at least got to the inside track and made him uncomfortable.[This message has been edited by lou_dias (edited 06-29-2024).]
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WOT-Tech
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JUL 01, 03:22 PM
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| quote | Originally posted by La fiera:
Look at this dyno and here are the specs.
-3500/3400 hybrid
-12.4:1 Compression ratio
-WOT-Tech Street/Strip cam
-Aluminum Heads
-65MM TB
Build by WOT-Tech itself.
This is the cream of the pie right here. How come an overbore 3400 can make more power with Iron Heads than the almighty aluminum heads with a huge 65mmTB and way more compression.
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First post, cool thread (that's some dedication!). Figured I should give the details on this engine comparison since it was called the cream of the pie.
Its a 3400 with camaro pistons and rings, stock 3500 heads, stock 3500 lower, 3400 upper ported for the throttle body, stock exhaust manifolds, a street/strip cam with matching springs and pushrods, and a 65mm throttle body. The dyno sheet is a comparison of 56 to 65mm throttle body on this engine.
Now that im caught up, I can't wait to see how this progresses 
Quick Edit. WOT-Tech didn't build the motor. It was done by Dan's 15 year old daughter as her first engine build (R&R Motorsports)[This message has been edited by WOT-Tech (edited 07-04-2024).]
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lou_dias
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JUL 01, 05:12 PM
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My last cam was the 480/480 WOT-TECH cam that made advertised peak power at 4900...which is exactly where I made it.
It served me well for 6+ years!
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jdv
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JUL 02, 08:44 AM
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lou_dias is this considered a full race engine? With all the work that was done to it from top to bottom.
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lou_dias
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JUL 02, 04:39 PM
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No. I am on pump gas and I drive it thru traffic to the track about 30 minutes and back and my CR is only at 11.2:1 and I don't have a dry sump or anything. I have a Fiero alternator and water pump still robbing me of power.
I'm only running a 2.5" exhaust and it actually goes down to 2.25" before the muffler...and yeah - I still have a muffler.
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lou_dias
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JUL 02, 06:00 PM
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Here's the 7000rpm dyno before we did any tuning that day...
It was running too rich - below 12:1 for this run. 7000rpm = 155mph ... still made 159rwhp at 7000... The cam is supposed to peak around 6200 so once it does that then it will be right and good.
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lou_dias
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JUL 07, 11:21 AM
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