Smog pump supercharger
- Thread starter Thepaetsguy
- Start date
The 4hp is a big catch 22 because the flywheel/cam and coil off a 5hp fit but no billet rod.
Comparing the 4hp setup on the right to the 5hp setup on the left I’m hoping I won’t have much trouble.
It probably has something to do with being built in 1963 but everything is so much beefier. they really thinned down the castings later on.
Comparing the 4hp setup on the right to the 5hp setup on the left I’m hoping I won’t have much trouble.
It probably has something to do with being built in 1963 but everything is so much beefier. they really thinned down the castings later on.
15psi gauge and I don’t know how to tell if it’s right. At idle it reads nothing. At anything past half throttle cruise it jumps between 12-14psi and at WOT the gauge just pegs. I’m not thinking this pump is pushing 15+ psi but the engine pulls like an ox
If I get going wide open and let off the gauge slams from 15psi to zero in like an instant.
If I get going wide open and let off the gauge slams from 15psi to zero in like an instant.
I don’t think the gauge is right the first gauge broke this second one says 15psi
I’m going to order another gauge that reads above 15psi and if that one reads like this one does I’m going to be very happy as I have not even ran the pump at 1 to 1 yet.
It’s said these pumps will push 20+ psi on a 50cc so I really don’t know
I’m going to order another gauge that reads above 15psi and if that one reads like this one does I’m going to be very happy as I have not even ran the pump at 1 to 1 yet.
It’s said these pumps will push 20+ psi on a 50cc so I really don’t know
The gauge at cruising speed flutters from 12psi to 14psi and slams instantly to 0psi when off the throttle. At WOT flying down the street the gauge pegs at 15psi.
I hooked up a third gauge and got the same results a flutter from 12-14psi and the gauge slams to zero off throttle and at WOT I got a flutter from 15-17psi.
I posted a small video of the performance and fun group of the gauge while driving. It seems to be reliably making 15+ psi
I hooked up a third gauge and got the same results a flutter from 12-14psi and the gauge slams to zero off throttle and at WOT I got a flutter from 15-17psi.
I posted a small video of the performance and fun group of the gauge while driving. It seems to be reliably making 15+ psi
https://www.youtube.com/shorts/WONGyi20TRA
Lets see did this upload right? If it did here is a short video of the gauge
Lets see did this upload right? If it did here is a short video of the gauge
I think that’s where Justin W went wrong he added that intercooler. I also noticed in his video he never sealed up the holes all through the pump body of the pump he was using. The 4hp engine does not run hot at all. Much cooler then my 5hp’s
I’m basing this engine of his engine and my 350
-pulley driven
-no burst plate
-low boost
I was told the pump had to move a certain amount for the little 4hp to run at all. And I didn’t think I’d get anymore then 2psi like Justin’s engine. If the 15psi reading is correct that is phenomenal in my opinion. Got wayyy more then I’d hoped for.
I’m basing this engine of his engine and my 350
-pulley driven
-no burst plate
-low boost
I was told the pump had to move a certain amount for the little 4hp to run at all. And I didn’t think I’d get anymore then 2psi like Justin’s engine. If the 15psi reading is correct that is phenomenal in my opinion. Got wayyy more then I’d hoped for.
Didn't I read that you observed your intake pipe was warm or hot at the intake port? If that black steel pipe was hot, it was either compressed air heat or blower friction heat. Either way, an intercooler would cool it down. An intercooler would also act as an air "damper or capacitor" to stop your boost from bouncing around like it does.
You would have a big problem getting a pulley on the flywheel side as 212’s use starter cup. You can’t run it off the crank side as it would be running the pump in reverse.
If you managed to get a pulley on the flywheel side you would most likely loose the pullstart system all together. The intake would be different.
You need a briggs with the I/C starter cup and copy what I’ve done or you have A LOT of reworking to do.
If you managed to get a pulley on the flywheel side you would most likely loose the pullstart system all together. The intake would be different.
You need a briggs with the I/C starter cup and copy what I’ve done or you have A LOT of reworking to do.