Elmer Racing

Elmer Racing OEM performance engines tailored for your super car, race car, or marine use case! https://elmerracing.com
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Custom race cars, custom billet engine parts, custom suspension parts and composites are our game! Advanced CFD work, FEM, CAD, weight optimization, vehicle simulations, 5 axis CNC milling & 3D printing is what we use to design and produce the very best parts!

What funny and stupid fails have you done on your engine builds?Getting the drysump pump drive chain length spec correct...
15/06/2026

What funny and stupid fails have you done on your engine builds?
Getting the drysump pump drive chain length spec correct shouldn't be a hard problem. But sometimes it's too short. Then it's too long. And only on the third try is it just right!😆
Length does matter! Who knew?
Especially when it's a custom (non-industry standard) chain that you don't have any local suppliers for. Not a expensive mistake, but does take a long to iterate.
Finally set now. Might need to ad a chain guide on the tension side. But having a little room to wiggle around might actually be beneficial in reducing the oil pump shaft torque spikes. So don't want to add it in unnecessarily.

09/06/2026

4000hp Hel engine test assembly done!
Moving to customer engine assembly next. First engines going out in a few weeks!
Prices will increase once that happens. (due to higher than expected amount of custom parts needed, such as making our own billet titanium connecting rods)
Current pricing still available on our webshop till 30.6.2026.

4000hp Hel short block test assembly readywith correct clearances!Our custom billet titanium connecting rods ended uphav...
23/05/2026

4000hp Hel short block test assembly ready
with correct clearances!
Our custom billet titanium connecting rods ended up
having to be a little beefier than our initial placeholder.
So we have to manually clearance the block to give at
least 2mm clearance. Batch 2 blocks will have this
detail fixed.
Doesn't look perfect, but it's structurally ok to
manually clearance here, passes customer use
approval.
Long block getting ready to go together also, first head
fully assembled in spec!
https://shop.elmerracing.com/14-racing-engines

Introducing our Billet Merge Collector 'What could go wrong?' durability guarantee!1 free replacement, regardless of how...
17/05/2026

Introducing our Billet Merge Collector 'What could go wrong?' durability guarantee!
1 free replacement, regardless of how it broke. Just send us the pictures/videos and permission to use them. Full terms on the TOS page on our webshop.
So what happened in this customers case?
Based off the images it looks like a combination of factors. Vibrations and thermal expansion loads from the wastegate exit pipe transmitting though the wastegate to the wastegate mounting. High temperatures due to thermal insulation and likely closed floor (time attack car) with minimal airflow around the exhaust. Sharp edge on the *inside* of the wastegate duct to the runners/turbo area. Lots of heat cycles and use.
Due to customer time constraints to get the car ready for the next event, we sent out a replacement collector of the same dimensions, but updated model with filleted wastegate exit (yellow highlight in picture, all our newer models have this update). Other option was to make a custom one from 316 or 321 stainless material, but this would have taken a few more days for raw material lead time.
We also recommended changing out the slip-over fitting for a flex piece. And incorporate a external support clamp between the wastegate and main exhaust pipe.
And if possible, any slight increase in airflow around the header pipe would help reduce peak temps and thermal cycle load.
We think our 5 axis Billet CNC Merge Collectors are the most durable parts available. But sometimes things can happen. If it does, we have your back. And will try to help you avoid another failure.
https://shop.elmerracing.com/10-merge-collectors
https://shop.elmerracing.com/content/1-TOS

10/05/2026

F1 engine rules are changing for 2031.
Elmer Racing F1 engines incoming?

4000hp v6 first engine assembly progress.Rods, bushings, pins, clips, pistons, piston rings. All looking good. Tested fo...
05/05/2026

4000hp v6 first engine assembly progress.
Rods, bushings, pins, clips, pistons, piston rings. All looking good. Tested for rotation clearance in the crank case earlier.
Custom tool to mount piston pin clips in the bottom left of the picute. Crazy stiff clips, hence the need for a tool, but should stay in there even at max rpm (well above 11,000rpm)!

CNC toolpath update for the 4000hp Hel billet tool steel crank looking mint!No more small corners left over here and the...
30/04/2026

CNC toolpath update for the 4000hp Hel billet tool steel crank looking mint!
No more small corners left over here and there. And much more reasonable tool wear.
Bearing surface polishing/grinding should be much faster and easier also.
The surface shape around the highest loaded areas is especially critical for longevity in a crankshaft being pushed as hard as this.
Peak stress needs to be kept in check, but for longevity it's even more important that the stress levels don't change too rapidly, as that aids crack propagation/fatigue.
This is why our crank designs have a almost organic shape. With the power density we push for in our designs there is no other way to make this work. Design time is crazy high (compared to basic cranks), but absolutely needed.
And the CNC machining side then needs to be able to effectively make these crazy shapes. This also takes a lot of skill and dedication to achieve.
The up side is that at least design criteria wise, we can push these crazy high power densities that are unheard of from other OEM's.
The only reason we even attempted this was how well our Thor crank has performed. Giving us confidence in that we at least know a little about what we're doing.
There are no guarantees in racing or when pushing boundaries. But it's what we love, and what we're good at.

21/04/2026

Our new lightweight easier to weld version of the 4-to-1 parallel entry billet merge collector! Standard version recommended for all use cases, lightweight recommended for drag racing.
Central spike has much lower heat conduction in the lightweight version, which may cause overheating in prolonged high temp use.
2"in 3"out versions 1152g & 709g
2.25"in 3.5"out version 1427g & 847g
2.5"in 3.5"out version 1496g & 1011g

Hel cylinder head getting ready to go on the short block!The recipe for making maximum power: biggest possible bore to b...
07/04/2026

Hel cylinder head getting ready to go on the short block!
The recipe for making maximum power: biggest possible bore to be able to fit the biggest valves possible. Keep port area transition as smooth as possible, taking valve guide into account, for minimum flow disturbances in the transonic flow regime. Highest possible cylinder pressure at the highest possible rpm.
5000cc 4000hp vr38dett replacement engine.

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Luomankuja 28
Kirkkonummi
02440

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