Love this tutorial. This is a good example of the knowledge, experience, and time it takes to build a competition motor. We were heavy into racing in the late 80's and into the late 90's. It takes time and commitment to build a quality product. As we have seen....it takes very little to destroy good work. Finding a tuner with talent can be a challenge. Great work. Be good. Stay safe!

In the Dagenham factory we used a burette, it's much more accurate! I was a production engineer on OHC block and heads, York Block and heads, Kent block, and the Kent diesel block after the changeover.

Like the new sign Lee, all thorough I thing Paul did it with some Duck tape and a blunt knife. Going onto the MGB why did they not remove the breathers and bung up the hole on the inlet, run the engine and see if the smoking stops, before pulling down a rebuilt engine. Basic mechanics in my day. I raced a 1.5 per x flow on 45s in a Cortina MK1, what an engine. It never missed a beat even when revving it to 10000.

The pre crossflow, appeared to have polished ports on all of them. i could be wrong, these engines from my experience performed so much better with a rough inlet to mix the fuel and air, and polished exhaust,to get rid of the rubbish, Also the cam you have in the "hot" crossflow, is very mild, and not a race cam, if you want a race cam go to a 285, that i used many times, or from memory, a 300, but no good on the road,

Back in the day we use 85mm Powermax pistons, Vandervell bearings and Kent cams to get the 1600cc ford up to 1760cc for the people who cheated in the 1600cc class and we did build a lot of these, but you need to get the right block for the job. It is also easy to bump the oil pressure up by pressing the pump release spring in so you can add a washer between it and the block, do not add to many as we tried more and blow a filter O ring out and what a bloody mess that was.🤫

MUCH BETTER THAN THE WHINGING WARRANTY CUSTOMER DRAMA OF PREVIOUS VIDEOS and a better image for your business👍👍👍. Its nearly 30 years since i build a xflow and this brings back many memories👍👍

Love this channel. Always an interesting watch.

Such dedication and precision, I found it very interesting. Keep up the great work. Look forward to part two

That sounds great Lee. I'll look forward to watching the video of the meet up and see how this engine performs. It will also be cool to see the kit car on track again. I hope you kept the timings from last years outing!! Every video is superb. However, I do love the mystery blow up's and the detective work involved!! Thumbs up to you all!!

Lee on compression ratio I forgot to mention to remember to account for rod expansion/stretch. Expansion can be measured with a rod&piston assembly out of the block. Measure the length at room temperature then put it in an oven at about 150C and measure again.

Loving the pre crossflow build 👍

Top episode Lee and Paul, I love my x-flows.

Lee nice video very time time i watch a video on the " internal Confusion engine " i learn some thing new . Keep up the good work Kit from Down Under

Excellent presentation with Paul and yourself. Four hands are far better (it leaves two to film, and two to show) , the stability of the filming is far steadier, and the banter back and forth makes for relaxed but very informative audio. Really looking forward to part 2.

A Graham Bell wrote 2 amazing books in the early 80's. one was a 2 stroke book and the other was a 4 stroke book. If you're getting into engine tuning I suggest you buy both. They'll cost you a load of money but,the guys knowledge was Amazing. explains how to do this in his books for both cars and bikes...3.30 onwards ,volumetric displacement

Well done Paul!

I like this content 👍 very useful

somone is going to grief you lee about that tiny air bubble when you measured the cylinder head

Fillet Radii Paul. Good video.

I would like to see more how you grind your crankshaft. I like how you check all your workmanship and measurements.

When I have done this its first done to make sure all the cylinders are the same cc to ensure all cylinders are the same compression ratio removing material from the chambers or grinding the valves so they all are. I have only one hole in the perspex and angle the head slightly so that hole is at the top by the edge of the chamber and use a smaller more accurate medical hypodermic from a vet. Especially when running high compression ratios say around 14 a small cylinder to cylinder cc difference can be critical.

Very interesting, thank you. :)

Who knows, maybe in a few more videos I'll realize I know nothing about car engines. 🤣 Really enjoying the content. 👍

The plasti gauge is a variation on what in industry (With much larger bearings) was checked with lead wire. Same process but the wire is measured with a micrometer after being squeezed in the bearing.

Good vlog lee 👍

Thank you 👍

Lee, I'm thinking those sharp corners where the valve cutout cuts out the side of the piston could be a source for pre-ignition. Me thinks I would have rounded them off a bit to negate the potential hot spot.

interested to know, if you did the plastigauge and the resulting measurement was not within your expected tolerances at this stage, what would you do to fix it?

Are the con rod bolts, stretch bolts ie limited amount of times they can be torqued up? On my Yamaha R7 OW02 race bike this is limited to two times and they cost £850 a set.....if you can get them.

With the pre crossflow do you ever have trouble with the fairly narrow edges of the valve cutouts heating up and causing pre ignition?

Hi Lee what's the best way to put the cam bearings into a crossflow pls 🙏

I'm sure that's a syringe not a pipette....I got told off by my chemistry teacher for mixing that up....🤣🤣🤣.... Great video as always chaps always interesting one of my favourite channels

thanks for super good movies 💪. don't you want to do a little conversion of an escort pinto 2.0 with cosworth crank and conrods.

do you static or dynamic compression?

It’s a bit more accurate to use a burette and smaller holes in the Perspex and only fill them to the bottom of the hole

Have you tried to make a nice round clear plate instead of a broken off cut of perspex. Would a 100cc burette be alot better than a cheap syringe? I noticed a small bubble left behind when filling, would that affect the final volume.,?

Brilliant. The devil is in the detail, I'm learning!!!!

Did you number 1 to 4 con rod from the rear of the engine? Sure looks like no 2 in felt tip on no 3 cylinder not that it matters I guess as all new and can go anywhere.

Not sure how to contact you so writing it here. iam just wondering how expensive would be to bore cyl block from 84mm to 86mm talking about bmw e36 325i m50b25 cast iron block. Thinking any chance would be to fit s50b30 m3 pistons in.

Are you calculating the static or dynamic compression ratio? For a performance engine the dynamic compression ratio is more important as it accounts for the valve timing as well as the other factors. A DCR should be in the order of 8-8.5:1, whereas the static compression ratio can be 10-12.5:1. The higher the compression the more power an engine will put out but above the DCR limit detonation can occur, the art is to get as close as possible to the DCR of 8.5:1. Whilst the engine appears to have been ported and the chambers relieved, have they been cc'd. CC'ing only one chamber presupposes the rest are the same - is that the case?

5:12 That's NO pipette it’s a cheap syringe with the accuracy of a bucket. How come in your great well equipped works don’t you have a good quality burette, only cost a few quid and would instil great confidence in the works.

That sign looks like it could be better a bit right ?

Wall looks very smart, indeed. But I'm still waiting for when your young apprentice cleans up the dust from the wall receptacles ;-)

Very interesting educational video.

Got a quick question I've rebuilt my n43b16a engine from116i I bought a head gasket set from the shop which they said was the right one for my engine and it just will not start tried for over a week all times perfect looking through the receipts and parts what I've noticed is the original head gasket is 0.62 and the new gasket the shop gave me was 0.80 which has been installed would this be our problem of a no start with lowering the compression of been thicker or would it not make much of a difference any help would be greatly appreciated 🙈 😎

Do you sell Barum Engines stickers? I'd love to have a couple for my drag racing car

like it not the way i do it but IT WORKS

Every time I leave a comment on a firing order of a small block Chevy on any other forum that isn't engine related ..people think it's a hate number or some code 😂😂😂😂😂😂..ridiculous

Where did the name come from? Is it the family name??

Yeh I suppose it's free advertising for you ,your name on the wall, and a plug for the sign people . Fair dos.

I'm a bit surprised that you only measured the volume of 1 cylinder. On engines that I have worked on where the head has any sort of resizing of valves or changing chamber geometry we always measured the volume of every cylinder to make sure that they were within a millilitre or less in volume.

That looks like a large syringe not a pipettes.

Have you guys had much experience with the ford 2.2 diesel? My works van crapped a piston at 76k stuck a recon engine from ivor searl into it, now its on 116k so 40k on engine and its just let go again tonight. Need to do a proper diagnostic as to why tomorrow. I know that they are guilty of going but just a thought on your experience with them

Where do you get you paraffin from, seen cleaner 2 year old diesel engine oil?!

I got told by a m sport employee his engine man will build a engine as light as possible with bits missing including a piston ring so there’s less friction to make the piston move faster … I was like 😮

why did cylinder 3 have 2 on it's side please

I plastigauge all my bearings Best double check there is. As you say I know what it is going to be(and it better look like it is within .0001) BUT I am human and that is the easiest cheapest way to catch my mistake

Do you sell hoodies or T-Shirts??

Hopefully it's not the same tuner as the M3!

Self recommendation is no----- substitute???

I noticed someone got 1.5 thou mixed up with 1.5 mm but corrected himself quickly When i put how far the piston was above the block and mistakenly said mm you all laughed at me HA ha im not the only one to do it, and thank goodness the squish was not 1.5 mm on the crank

"...running on 45 Webers....". Wow! Oh...you mean the model of Weber....sorry...as you were...

On this pre xflow engine .... It's like hearing dejavu from my father (retired) he's saying it then you guys are repeating what he's saying... I guess once a mechanic always a mechanic

Always a better video when your not greetin’ like a big woman over a warranty job. Cheers now.

Do you use Esso blue? 😂

Building and engine right now…. I am three days and $350 into trying to get the correct push rods as the ones I have just touch the underside of the roller rocker at maximum angle… so close, but this has probably pushed the build completion out by another week :(

No volume

The Barum Engines sign behind you is blistering all over...doesnt look good at all..

The sing dosent look level

That’s better at least you didn’t admit to killing President Kennedy today 😉

"How to build race engines " then uses plastigage.... dang let's move to the 21st century,

Don't use a BMW engine