Stoffregen Motorsports Posted October 21, 2012 Report Share Posted October 21, 2012 What type of baffling are you using? Plates or unravelled "brillo pad?" Staggered and angled plates welded to the interior of the box. Quote Link to comment
Stoffregen Motorsports Posted October 21, 2012 Report Share Posted October 21, 2012 Mine does the same thing. It just isn't as pretty. There is a steel tube that goes around the back of the block and under the header to the breather hole in the block. Right now it's getting a moroso crankcase evac in the exhaust down tube, so I might ditch this and build something else. It never dumped any oil on the ground, but I'm not sure how good it worked. When you run to redline every shift, ie- road racing or open track sessions, you definitely puke oil. And I wouldn't want to run a EGR system as it creates a vacuum leak that can affect jetting and also cause detonation. I have used EGR on my street setups before though with a degree of success. Quote Link to comment
EricJB Posted October 21, 2012 Report Share Posted October 21, 2012 When you run to redline every shift, ie- road racing or open track sessions, you definitely puke oil. And I wouldn't want to run a EGR system as it creates a vacuum leak that can affect jetting and also cause detonation. I have used EGR on my street setups before though with a degree of success. I agree. I would'nt run a pcv on my drag truck, but most of these guys are driving theirs daily. Nothing wrong with upgrading the breather, But for street use, I would retain the system that has some sort of draw. Here is something I am working on. Not sure what the exact routing will be, but it ends dumped in the exhaust. Nothing like car parts in the kitchen. Quote Link to comment
72240z Posted October 21, 2012 Report Share Posted October 21, 2012 I agree. I would'nt run a pcv on my drag truck, but most of these guys are driving theirs daily. Nothing wrong with upgrading the breather, But for street use, I would retain the system that has some sort of draw. To serve what purpose though? What proven benefit is gained by going through the trouble as apposed to just venting to atmosphere? Some say neg pressure in a block is good but way more so on a race set up. Some say on a street car it can be bad. Idk honestly, like EGR there is a lot of info on both sides of the table. Have you looked through datsun garage before? He has done something similar to what you got. "crankcase evacuation system" Quote Link to comment
Stoffregen Motorsports Posted October 21, 2012 Report Share Posted October 21, 2012 To serve what purpose though? What proven benefit is gained by going through the trouble as apposed to just venting to atmosphere? Some say neg pressure in a block is good but way more so on a race set up. Some say on a street car it can be bad. Idk honestly, like EGR there is a lot of info on both sides of the table. Have you looked through datsun garage before? He has done something similar to what you got. "crankcase evacuation system" Some say a vacuum actually helps pull the pistons down the bore, which does make HP, but a real world benefit of PCV, it pulls vacuum through the crank seals and keeps your motor from leaking oil! I agree. I would'nt run a pcv on my drag truck, but most of these guys are driving theirs daily. Nothing wrong with upgrading the breather, But for street use, I would retain the system that has some sort of draw. Here is something I am working on. Not sure what the exact routing will be, but it ends dumped in the exhaust. Nothing like car parts in the kitchen. Those seteps are not legal for road racing. I think it has to do with oil getting on the racing surface. I do dig the parts in the kitchen though!!! Nice truck btw. Quote Link to comment
72240z Posted October 21, 2012 Report Share Posted October 21, 2012 Ya thats what I have read on it, I have never seen quantifiable results though. People say having an egr set up is actually beneficial because the space it takes up in the combustion area would be un-used anyway, again though I have never seen proof on paper. They have discussed both pretty in depth over at hbz. I would be more inclined to believe if I saw dyno sheets proving any of it. Its funny you mention the oil on the track thats the prob the guy whos pic I posted originally had lol. Before dialing the set up in he was sucking oil out of the engine the draw was so strong. Quote Link to comment
EricJB Posted October 21, 2012 Report Share Posted October 21, 2012 Are we talking about exhaust gas recirulation, or positive crankcase ventilation? The purpose of a pcv system on a street car is to draw out the things that shouldnt be in the crankcase. Moisture from condensation, various undesirables from blowby and incomplete combustion. Without it, your oil will need to be changed more often. In a race situation, it is better to vent it to the atmosphere than have it go down the intake and mix with the air/ fuel. Crankcase evac systems only work where there is no exhaust back pressure. And yes, you have to be careful of dumping oil out. Clearly more than 1 way to skin a cat. Quote Link to comment
EricJB Posted October 21, 2012 Report Share Posted October 21, 2012 Sorry for the thread hyjack. Allow me to put us back on track. My unfinished 280Z. 406ci SBC/700r 1 Quote Link to comment
Stoffregen Motorsports Posted October 22, 2012 Report Share Posted October 22, 2012 Sorry for the thread hyjack. Allow me to put us back on track. My unfinished 280Z. 406ci SBC/700r That is nice. Most scarab jobs look like shit, but yours is very clean. Are those solid motor mounts I see? Quote Link to comment
I'm BLUE Posted October 22, 2012 Report Share Posted October 22, 2012 That is nice. Most scarab jobs look like shit, but yours is very clean. Are those solid motor mounts I see? Agreed .. It is a clean install he did ! 406sbc none the less... love this :cool: I was under the impression the original Scarab engine mount conversions .. keep the sbc much farther forward versus the JTR type mounts that are so popular these days which push the engine pretty close to the firewall (.5 inch-ish) . I don't know if i'm on target lol. Quote Link to comment
EricJB Posted October 23, 2012 Report Share Posted October 23, 2012 The brackets are the setback style. I just made stancions and welded them together, instead of using solid spacers, so they look different. And they're on top of stock sbc mounts. If you look at the first pic, the harmonic ballancer is almost behind the steering rack. One of the nicest pieces I made on this project is the trans crossmember, But I forgot to take a pic. The 600 Holley is on my truck now, and the Z has a 750. Quote Link to comment
2HIPN2LO Posted October 23, 2012 Report Share Posted October 23, 2012 my OLD 620, complete with Heineken brass badge at top...done in the 80's http://i263.photobucket.com/albums/ii126/1BdBagr/620-engine.jpg[/img]"]http:// Quote Link to comment
EricJB Posted October 23, 2012 Report Share Posted October 23, 2012 Cool valve cover. Quote Link to comment
2HIPN2LO Posted October 30, 2012 Report Share Posted October 30, 2012 Cool valve cover. recently found out that valve cover was 1 of a production run of around 200. It was a nice looking unique piece. Tim Quote Link to comment
highdesertdatsun Posted March 20, 2013 Report Share Posted March 20, 2013 Any j1300 engine pics? Bump Quote Link to comment
Xnke Posted March 20, 2013 Report Share Posted March 20, 2013 I'll get a full-bay shot tomarrow. Quote Link to comment
72240z Posted March 20, 2013 Report Share Posted March 20, 2013 oh you tease you Quote Link to comment
Cpl620 Posted March 20, 2013 Report Share Posted March 20, 2013 in the 240 now, going in to the 620 soon. Quote Link to comment
Big_E-Dog Posted March 25, 2013 Report Share Posted March 25, 2013 My 510 wagon 1 Quote Link to comment
Creepy Cruiser Posted March 25, 2013 Report Share Posted March 25, 2013 That's pretty cool. BTW, what master cylinder are you running? Quote Link to comment
pwee4u2c Posted March 25, 2013 Report Share Posted March 25, 2013 I don't think there are enough A series engines on this thread....that being said here's my A12. Quote Link to comment
Big_E-Dog Posted March 26, 2013 Report Share Posted March 26, 2013 That's pretty cool. BTW, what master cylinder are you running? thanks...its scary tho LOL! 88 z31 300zx w/q45 calipers up front and aluminum finned drumbs in rear Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.