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Search found 201 matches

by rebelrouser
Sun Sep 15, 2019 8:45 pm
Forum: Engine Tech
Topic: lean on both banks...1999 C2500 Suburban
Replies: 30
Views: 1228

Re: lean on both banks...1999 C2500 Suburban

If you have access to a scan tool, check your mass air flow sensor. https://www.otctools.com/ve directions and online calculator to perform the test. Computer runs the injectors per how much air goes in the engine.
by rebelrouser
Sun Sep 15, 2019 11:10 am
Forum: Engine Tech
Topic: Port velocity vs cfm
Replies: 18
Views: 806

Re: Port velocity vs cfm

If you can gain access to one, a smoke machine will pressurize your crankcase with smoke that will glow with a UV light, it will find any small leak spots in your engine. Lot of general automotive repair shops use them for evap system and leak diagnosis. I had some issues with my engine not building...
by rebelrouser
Tue Sep 10, 2019 9:52 pm
Forum: Engine Tech
Topic: another blown up jetboat motor sbc
Replies: 16
Views: 1021

Re: another blown up jetboat motor sbc

I have built several 383 SBC jet boat engines, never had one drop valves, seen them blow head gaskets, bend rods from getting water in the cylinders, etc etc. One thing just to check, the guys around here like to go in 6 inches of water, at 60 mph, drinking beer and otherwise having a good time. Eve...
by rebelrouser
Thu Aug 29, 2019 6:43 pm
Forum: Engine Tech
Topic: 2618 Piston Street Use Longevity
Replies: 131
Views: 20948

Re: 2618 Piston Street Use Longevity

all my race engines use ross pistons with 2618-T61 alloy, very strong tuff pistons. When I build a dual purpose street strip type engine I use the 4032 alloy. The main reason is that I have seen a lot of scuffing and cylinder wear from the skirts of the 2618 alloy pistons when used in street engines...
by rebelrouser
Mon Aug 26, 2019 9:54 pm
Forum: Engine Tech
Topic: Opinions on this valve job.
Replies: 16
Views: 1134

Re: Opinions on this valve job.

IMAG2451.jpgIMAG2449.jpgIMAG2452.jpgIMAG2445.jpg The contact is really high on the valve, basically on the edge, and also extremely narrow. I ran the engine for about 100 miles before I took it back apart for a completely separate issues. (lost the crank thrust bearing) When I cleaned the head for ...
by rebelrouser
Thu Aug 22, 2019 12:47 pm
Forum: Engine Tech
Topic: pressed in pins (rod temperature)
Replies: 35
Views: 1175

Re: pressed in pins (rod temperature)

Ford's factory manuals wanted the pins pressed in while cold. There were a number of different piston holding fixtures to keep from crushing the skirts while doing so. For OEM Ford pistons only, of course. I was taught "bright red with the shop door closed", and never had any trouble. Though I did ...
by rebelrouser
Wed Aug 21, 2019 8:47 pm
Forum: Engine Tech
Topic: pressed in pins (rod temperature)
Replies: 35
Views: 1175

Re: pressed in pins (rod temperature)

I use a Goodson rod heater set to 450 degrees, and a special marker that melts at 450 degrees to verify the temp. Oven has a temp setting, but the marker just backs it up. My big deal is that if the heating of the rod leaves a blue mark, my opinion is that the properties of the metal has been change...
by rebelrouser
Sat Aug 17, 2019 9:08 pm
Forum: Engine Tech
Topic: liner advice
Replies: 3
Views: 215

Re: liner advice

Having been down this road do you recall what the original recommended max press fit should be when the liners were installed new. I had to get that from world years ago for a same issue but it seems to me that .001" dry no retaining compound was the number. Some I have seen as a slip fit with the ...
by rebelrouser
Sat Aug 17, 2019 12:19 pm
Forum: Engine Tech
Topic: liner advice
Replies: 3
Views: 215

liner advice

Just need some free advice if I can get it. I posted a while back that I windowed my aluminum world products RB mopar block. I borrowed a mill and cut out the broken sections, made some repair pieces, and had it welded back together, turned out really well, hard to see where it was broken. Took it t...
by rebelrouser
Mon Aug 12, 2019 4:53 pm
Forum: Engine Tech
Topic: Why haven't we moved to higher DC voltages?
Replies: 37
Views: 1199

Re: Why haven't we moved to higher DC voltages?

I have been waiting for the OEM to design an electronic camshaft, using solenoids for variable lift and duration, when I talked to a couple engineers they said 12 volts was not enough. Several years later we have diesels using paired injectors to develop over 100 volts using voltage inductive spikes...
by rebelrouser
Tue Aug 06, 2019 7:08 pm
Forum: Engine Tech
Topic: Rod, torque wrench or "stretch"?
Replies: 24
Views: 681

Re: Rod, torque wrench or "stretch"?

for what it is worth, I check the rod bolts for length and then torque them, and then check the stretch, more often than not I find the given torque spec does not stretch the rod bolt to the spec given. I then torque in small steps until the stretch is correct. I find most of the time 5 lbs over the...
by rebelrouser
Sat Aug 03, 2019 9:48 am
Forum: Engine Tech
Topic: Grasping at straws...can a car battery affect performance?
Replies: 21
Views: 1070

Re: Grasping at straws...can a car battery affect performance?

Not so much the battery, but an alternator with a weak diode can cause stray AC voltage to affect the computers and modules in your vehicle. Real easy to check, just put a volt meter across the battery terminals, set meter to DC volts, start the engine, turn all loads on, Meter should maintain aroun...
by rebelrouser
Tue Jul 30, 2019 11:31 am
Forum: Engine Tech
Topic: HELP....conversion needed..
Replies: 15
Views: 785

Re: HELP....conversion needed..

I have 2 Yanmar 3JH3 diesel engines to rebuild. I've been giving the factory manual for specs. Problem is the I can't find a conversion for the torque specs. An example of what the book gives is Main bearing bolt torque is 10.5--- 11.5 kg.m the only conversion calculator I can find converts it to 2...
by rebelrouser
Sun Jul 21, 2019 5:13 pm
Forum: Engine Tech
Topic: Eldebrock Carbs
Replies: 57
Views: 2490

Re: Eldebrock Carbs

I just found a 1405 and a 1406 for $200 shipped. They haven't been off the car very long and from what I found the kits are cheap. Since I know nothing about eddys what do you all recommend buying for tuning purposes? I've got a ton of stuff for holleys, nothing for these though. Back on topic. I h...
by rebelrouser
Tue Jul 16, 2019 11:26 pm
Forum: Engine Tech
Topic: Eldebrock Carbs
Replies: 57
Views: 2490

Re: Eldebrock Carbs

most of the wedge mopar nostalgia super stocks run a pair of them. With a little work they run fine. Several in our group have run in the 8's with a pair of them. I run a pair of the 750's on my car.