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Re: A14/15 turbo~280hp, bore question |
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Home away from home  
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2003/1/13 13:39
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Quote:
clyons8 wrote:
Hey Marcus,
Always wanted to ask, did those lightened conrods hold up in your current engine? Always wondered if they'd work well with the lightening they had had.
Chris
The lightened conrods have coped well in my engine setup. I havenīt had any problems with the bottom end even though I have used standard bearings and bolts on both the main and conrod bearings. I have used Castrol racing motor oil 10W60 Only problems that have occured are wrecked pistons (standard), but there has not been any problems up to 14psi! The pistons have broke at boostlevels over 20psi, likely because of massive detonation. During hot summerdays that has been some problems with overheating but after I installed a 70degrees thermostat and added waterwetter to the coolant the overheating problems dissapered.... M
Posted on: 2010/9/9 18:31
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I am building a mean Datsun E10 racer  , a15 turbocharged engine, aiming for 280hp....
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Re: A14/15 turbo~280hp, bore question |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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Quote:
ddgonzal wrote:
The sonic testing is to find core shift, variations in the casting. Cutting a block I think won't tell you about that since it varies in each block.
At least it will give me a hint on how thick the core is in general, itīs possible that I have to fill the block with Morosos engine block filler! M
Posted on: 2010/9/9 18:16
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: A14/15 turbo~280hp, bore question |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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Quote:
ddgonzal wrote:
I was going to say "impossible" but then i saw it was you. I don't know if anyone has boosted a 79mm overbore. Offset boring is best -- use a sonic tester to locate the thinnest portion of the wall and then bore accordingly. That's what they do with early A12 engines when doing large overbores (early engines have thinner cylinder walls).
Are you going to use head studs and o-ringed bores?
Am going to use head studs and a thick goppergasket but no o-rings. Itīs possible that itīs impossible without o-rings but I will give i a try. I donīt have access to an Sonic tester but I will try to do different testbores on a spare A14 block and cut it into pieces so I can measure the cylinderwalls at different points. I found five A14 and three A15 blocks yesterday when I was looking through my spareparts  I have a ported A15 head with 38mm intake and 33mm exhaust valves, with 7mm stems and cutdown to 6,5mm inside the port. Marcus
Posted on: 2010/9/9 8:58
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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A14/15 turbo~280hp, bore question |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
Group:
Registered Users
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I am building a A15 turboengine with Eagle H-beam conrods, and 79mm Wiseco forged flattop pistons. I am aming for 250-300hp. I have read that the A-blocks are bored out to 79mm and even 80mm in N/A engines but what happenes when you put a turbo in the equation, will the block handle the pressure? And how is it best to bore the block, centerline or offset? Anybody out there who has any experience?? At this time I have a boosted stock A15 engine with a ported head, pulling 150whp at 0,7bar boost! The engine that I am bulding will be transplanted in my Datsun E10 monster Thankful for any advice! Marcus
Posted on: 2010/9/9 8:30
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: Maximum Compression Ratio |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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Hi, I posted a picture of my dished pistons in the photo section!
Posted on: 2005/1/27 6:21
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: Maximum Compression Ratio |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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Quote: 3. Datsun100ATurbo runs 12.5:1 using octane booster (100 octane total) - This isn't far from 98 octance. The reason why my engine has worked with this high cr is bacause the cylinderhead has bad flowfigures and the exhaust manifold is original, the volumetric efficiance suffers from this... maybe it will be about 80-85%, according to my experiance this allows you to use a higher cr without detonation but hp and driveability also suffers from low VE so it would be better with a lower cr and a engine that breathes better!! About dished pistons, In my new turboed A15 (pictures under my photos) I am using dished pistons with the dish offset, the cr is 7,8:1 and I am running 12-20psi boost without much problems, I belive that well designed pistons are a huge help, the squish are also very important..... exactly like Feral said!! Feral has a huge fanclub here in Finland  Cheers Marcus
Posted on: 2005/1/26 13:55
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: Autronic SM4 |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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Are any of you guys using Autronic on your turboed Datsuns?? Are they worth the price??
Posted on: 2005/1/13 5:27
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: Autronic SM4 |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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According to my sources the SM4 was introduced at the Sema show in USA in November 2004, that
Posted on: 2005/1/11 9:56
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Autronic SM4 |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
Group:
Registered Users
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Have you guys in Australia seen the new Autronic SM4 for sale yet, I
Posted on: 2005/1/11 5:19
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I am building a mean Datsun E10 racer , a15 turbocharged engine, aiming for 280hp....
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Re: Camshaft and race headers!! |
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Home away from home Joined:
2003/1/13 13:39
From Forsby Finland
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I knew that Feral would come to the rescue....  THANX!! I understand what you mean with the numbers but what is a "camdoctor", is it a person or some tool?? I can send you the exact spec in a excel workbook to you if it would be of any help!? My turbo engine is complete so now I need a new challenge.... I am helping my brother to build a high comp race A14 engine! This cam is not suited for citydriving or cruising but I must admit that it would be nice to make a real killer turbo engine with this cam and a huge turbo that would start to make boost after 5000rpm....
Posted on: 2004/5/21 10:11
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