Pics of the other rods bearings?
Running any more rpm than previously with the same rods?
Search found 329 matches
- Thu Jun 10, 2021 12:32 pm
- Forum: Engine Tech
- Topic: Driven break in oil
- Replies: 14
- Views: 1699
- Mon May 03, 2021 7:48 am
- Forum: Engine Tech
- Topic: piston weight
- Replies: 81
- Views: 11061
Re: piston weight
There is a good Honda white paper from their V8 F1 engine about piston design, and them cracking due to the rpm’s they were running at the time. No, cracking was due to them not designing the piston properly to handle the rpm in the first place The white paper was toilet paper, used to clean up the...
- Tue Apr 27, 2021 12:33 pm
- Forum: Engine Tech
- Topic: piston weight
- Replies: 81
- Views: 11061
Re: piston weight
There is a good Honda white paper from their V8 F1 engine about piston design, and them cracking due to the rpm’s they were running at the time. No, cracking was due to them not designing the piston properly to handle the rpm in the first place The white paper was toilet paper, used to clean up the...
- Mon Feb 08, 2021 9:23 am
- Forum: Engine Tech
- Topic: Blueprint Engines Shop Tour Video
- Replies: 27
- Views: 3439
Re: Blueprint Engines Shop Tour Video
Surprised these weren't noticed -
Block main bores are not called main journals, and if you get bloody hands installing rings you are doing it wrong.
Block main bores are not called main journals, and if you get bloody hands installing rings you are doing it wrong.
- Sat Feb 06, 2021 4:01 pm
- Forum: Race Cars & Parts - For Sale or Wanted
- Topic: WTB - 302 SBF steel 3.100" stroke crank
- Replies: 3
- Views: 839
Re: WTB - 302 SBF steel 3.100" stroke crank
It can be any brand, as long as it's a usable core.
Let me know.
Thanks
Let me know.
Thanks
- Thu Feb 04, 2021 1:54 pm
- Forum: Engine Tech
- Topic: Valve Springs too Much?
- Replies: 28
- Views: 2766
Re: Valve Springs too Much?
Looking for some advice on valve springs for a sbc. Putting together a 11:1 iron vortec headed solid roller thing for a crazy street car, looking at a comp 12-773-8 solid roller with a 977-16 spring. An answer from comp on Summit’s site suggested this: For street use, 120-140 lbs closed valve sprin...
- Mon Feb 01, 2021 8:35 am
- Forum: Engine Tech
- Topic: tapered end connecting rods
- Replies: 20
- Views: 2616
Re: tapered end connecting rods
Was used by Roush in their NASCAR stuff back in the 90's, the piston inner pin bosses were tapered to follow the shape of the rod small end.... Made for a stronger deck in the piston, due to a reduced pin boss span in the piston undercrown. Rod small end widths, and therefore piston pin boss spans a...
- Sat Jan 23, 2021 4:35 pm
- Forum: Engine Tech
- Topic: Lighter valve train
- Replies: 16
- Views: 1872
Re: Lighter valve train
Hi all, i have located a cam lifter that are 30 grams less ( 53g total weight). I’m thinking of running less valve seat pressure to free up more horse power. These motors (spec formula single seaters) i build are flat fours with a lifter, push,rocker assembly. My seat pressure is 68 lb as these thi...
- Fri Jan 22, 2021 10:12 am
- Forum: Engine Tech
- Topic: Lighter valve train
- Replies: 16
- Views: 1872
Re: Lighter valve train
Spin data is great, up until the engine is put in the vehicle and encounters g forces.
It's just like any other tool, take it with a grain of salt.
Observing valve train wear will point you in the direction you want to go.
It's just like any other tool, take it with a grain of salt.
Observing valve train wear will point you in the direction you want to go.
- Fri Jan 22, 2021 6:43 am
- Forum: Engine Tech
- Topic: valve spring open pressure
- Replies: 18
- Views: 1862
Re: valve spring open pressure
There is software out there to do this. While I don't have the software and don't know the name for it, I have had this calculated for me. You do have to know the component weight and cam profile. This is the form I filled out for it. Software is just a prediction, real world can be different and u...
- Thu Jan 21, 2021 6:19 pm
- Forum: Engine Tech
- Topic: Lighter valve train
- Replies: 16
- Views: 1872
Re: Lighter valve train
Hi all, i have located a cam lifter that are 30 grams less ( 53g total weight). I’m thinking of running less valve seat pressure to free up more horse power. These motors (spec formula single seaters) i build are flat fours with a lifter, push,rocker assembly. My seat pressure is 68 lb as these thi...
- Thu Jan 21, 2021 5:58 pm
- Forum: Engine Tech
- Topic: valve spring open pressure
- Replies: 18
- Views: 1862
Re: valve spring open pressure
Depending on spring rate, open pressure can vary widely, and not enough or too much spring rate can both cause issues.
With more information, I can give a recommendation, if interested send me a PM
With more information, I can give a recommendation, if interested send me a PM
- Tue Jan 19, 2021 4:30 pm
- Forum: Engine Tech
- Topic: Ring Package
- Replies: 30
- Views: 3066
Re: Ring Package
Where NHRA Stockers are concerned, more than one ring in a ring groove has never been the best path to performance - 1. The top ring is moved down by spacer thickness, not good for hp. 2. The spacers are not as flat as they should be, not good for hp. Best results come from back cutting OE width ri...
- Mon Jan 18, 2021 8:40 am
- Forum: Engine Tech
- Topic: Ring Package
- Replies: 30
- Views: 3066
Re: Ring Package
Where NHRA Stockers are concerned, more than one ring in a ring groove has never been the best path to performance - 1. The top ring is moved down by spacer thickness, not good for hp. 2. The spacers are not as flat as they should be, not good for hp. Best results come from back cutting OE width rin...
- Sat Jan 16, 2021 4:13 pm
- Forum: Engine Tech
- Topic: 4.365 Oil Ring in 4.370 Bore
- Replies: 13
- Views: 1189
Re: 4.365 Oil Ring in 4.370 Bore
All I can find is standard tension oil rings for my 4.370 bore. They are 3/16. I can however find lots of choices for a 4.365 bore. What would happen if I ran a 23 lb ring for a 4.365 bore in a 4.370 bore? Or a 18 lb? The second ring will be a napier for a 4.365 bore. No vacuum pump. Just a pan eva...