Search found 220 matches
- Fri Aug 26, 2016 6:51 am
- Forum: Engines Area
- Topic: rv8 pistons pocketing
- Replies: 10
- Views: 5006
Because the crank has a component of the piston mass considered to rotate with it ie acting on the crank pin, as well as the 'bottom half' of the conrod. The calculation is 100% of rotating mass(big rod ends and rod bearings)+ 50% of reciprocating mass(pistons,pins,locks and rod small end) per cylin...
- Thu Aug 25, 2016 6:35 am
- Forum: Engines Area
- Topic: rv8 pistons pocketing
- Replies: 10
- Views: 5006
That's not correct. Will the crank balance be affected - yes it will, when manufactured the crank was balanced taking a nominal piston mass into account. Does it NEED to be re-balanced. Not necessarily, a few grams of valve relief probably won't be noticeable but if you were building a race engine y...
- Wed Jul 27, 2016 6:40 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
If as you say all 9.35cr 3.9 engines have the same pistons So an early 3.9 with 9.35cr with 14 bolt (36 cc heads )with standard factory fitted tin 4cc head gaskets and 23 cc pistons ,will have a gap above the piston including the dish of the piston of 63 cc agreed ? But the later 3.9 9.35cr engine ...
- Wed Jul 27, 2016 6:37 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
- Tue Jul 26, 2016 11:51 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
So, your second combination has a total compressed volume LESS than the standard 3.9 9.35:1 set up (your first example). CR is compressed volume divided by swept (+ compressed) volume. Your second example therefore has a HIGHER CR than the std 9.35:1 (your first) set up. Something over 10.6 : 1 with...
- Tue Jul 26, 2016 10:06 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
No, if they both small pin crank then they are completely identical with 23cc (?) piston volume. 28cc head plus thick (8cc) gasket is the same total as 32cc plus thin tin (4cc) gasket. Piston volume (plus dead volume at TDC) and swept volume are the same for both - hence both then end up as 9.35:1 (...
- Tue Jul 26, 2016 9:01 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
- Tue Jul 26, 2016 8:58 am
- Forum: Forced Induction
- Topic: 3.5 heads on 3.9 bottom end , twin turbo
- Replies: 25
- Views: 14167
Re: 3.5 heads on 3.9 bottom end , twin turbo
I know the heads are a bigger cc so 3.5 and 3.9 heads are exactly the same and are interchangeable. The compression ration differences in RV8s come from differences in piston bowl volumes between high comp and low comp and for the different engine capacities. The only change in head bowl volume com...
- Fri Jul 08, 2016 11:32 am
- Forum: Engines Area
- Topic: 4.6 with sd1 front cover
- Replies: 19
- Views: 8350
- Fri Nov 13, 2015 2:45 pm
- Forum: Engines Area
- Topic: Increasing displacement of 4.6
- Replies: 20
- Views: 8036
- Thu Oct 23, 2014 3:34 pm
- Forum: Engines Area
- Topic: Degreeing LR 4.6 Cam - @ .050 lift?
- Replies: 4
- Views: 2638
- Mon Jun 16, 2014 12:26 pm
- Forum: Drivetrain & Transmission Area
- Topic: Jaguar Powerlocks...
- Replies: 2
- Views: 2260
- Tue Jan 15, 2013 10:35 am
- Forum: Engines Area
- Topic: JE New Front Timing Cover
- Replies: 25
- Views: 9435
the water pump on the SD1 covers is crap AND hard to obtain, is this correct? No, on both counts I think. It has a longer nose which may or may not cause you an issue - done so that the viscous fan ended up close to the radiator in the relatively long nose of an SD1. The pulley is different - think...
- Tue Dec 18, 2012 12:10 pm
- Forum: Engines Area
- Topic: Front cover / water pump swaps
- Replies: 7
- Views: 2972
yes, but . . . you'll also need sump and oil pick up pipe to match from a non X bolt engine (sump front bolt pattern is different), cam swap to one that will take a distributor drive, a spacer to take up the extra length of cranknose that will poke through th old P6 crank pulley which you have to re...
- Fri Oct 19, 2012 9:44 am
- Forum: Engines Area
- Topic: Oil temp probe.... where to put it?
- Replies: 3
- Views: 1935
In the sump. Baulk oil temp is what you are interested in. You can't do much about the temperature rise caused by it going through the pump or whatever. Your best solution is to control the temp of the oil going into the engine and your best indicator of whether a cooler will be beneficial is the te...