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It never ceases to amaze me how you could get so much horse power out of an N/A 5 litre V8 @ 7500rpm, both Holden/Chev and Ford. Says a lot for our local engine tuning geniuses!.
Yes our local engine shops and race teams did a great job with these engines, which was highlighted with rumoured stories about NASCAR teams getting involved in the late 2010's. So a story goes, a NASCAR engine shop was given a rule book and asked to work out horsepower possibilities and engine performance. After falling well short of what we had produced, they couldn't and wouldn't believe what was actually capable until an Engine was sent over for dyno testing!!!
Crisp and bloody responsive. Love the ITBs. At idle, they just about sounded like the old Weber side draft carbs. I know at full noise, the induction noise just blows my mind.
Awesome, thanks for taking the time. These engines run as if they are large motorcycle engine, like a quad throttle body inline 4 banger, lumpy and crisp!
This is one of my favourite cars, Jack. I even have the replica model 1:18 scale. I love the day-glow red livery and red wheels and the engine sounds superb.
Hi Jack. Thank you for sharing. It is great to see you young blokes improving and expanding your knowledge base. Great idea to monitor temperatures... cheers to your Dad. Appreciated the video. 🎉
No worries! Funnily enough the dash layout in the Erebus car is/was still very similar to this actually, they did buy Walkinshaw cars to start their Holden/GM journey! Cheers!
Ahhh that beautiful sound of horsepower.....I love a worked Holden engine (304/5ltr) sound, but the LS is just one step nicer to hear. T/Y Jack for another great video, can't wait to see it circulating on the track again.
Dont mean to be some old angry fart, even thou l am,but having to put up with diesel turbo twin cab utes and all the noy racers with there fart machines the magic word listening to this engine was CRISP, a crisp high revving N/A engine is impossible to beat.
I was there, great show, car looks absolutely amazing Jack, you and your dad have done an amazing job. Id love to come to an open day at the factory. Are you going to have another one?
Many thanks! No unfortunately we don't have any open days on the horizon, the last one was because we were moving and needed to downsize and have a garage sale!
Have you tried rebuilding the engines with modern Piston (And Honing is a big one) and Camshaft technology? There's a RU-vidr called Stapleton 42 who documents vintage NASCAR, and he filmed the process of Lake Speed Jr. rebuilding his Fathers' Ford Cleveland D4 90's Cup Car for Vintage Racing. And with just wear items refreshed like valve springs and seals and gaskets, a more modern piston with low tension thinner rings and a hone from a modern Rottler honing machine with a profilometer. Just this netted the engine near on 100 Horsepower from what it made in the day!
That's something I'd like to do with our old Holden engines. This particular engine in the HRT car in the video is a recent build so the tech isn't that old.
Yeah we get lots of people asking about the exhausts but it's hard to show them properly when they are in the car and we don't have spare ones lying around to show. Leave it with me!!!
Hi Jack, when the car is not doing any driving and you fire it up every 3 months how often do you change the Castrol engine oil ? And what weight oil does the HRT use?
If it was just static engine run ups and no work on a race track then the engine oil really wouldn't need to be changed at all to be fair. Remembering that these cars do 1000km at Bathurst without an oil change. These engines will often only get an oil change at 1000-1500km. I'm not 100% sure what weight the Mobil race oil was, as it was kept pretty secret, however the Castrol V8Supercar oil is 15W-40. Cheers!!
Yeah sometimes, this one was run up like that when the transaxle was re-fitted just before Christmas last year, so maybe at the next run up I will for sure!
Man, I could listen to that all day! Unreal. Cheers Jack. Two questions, what fuel are these running? And with no engine fans, how long you running these up for? 5 minutes? 10 minutes? more or less?
FYI - We use a similar system in a Radical racecar, anytime you are heating oil that has an element or blanket on the oil tank only then you are not heating the engine oil in block, only in the tank. So if we are heating the oil we wait until we get about 50 deg C in the tank then wind the engine so the warm oil ends up in the block,the cold oil that will be ambient temp is scavenged back to tank and heated. We do this a few times over the course of say 15-30 mins pre start so as to get some temp into the engine and also heatsoaks via block into water as well. Some of our vehicles also run water preheat.
@@perkinsengineeringDo U run water preheat system? (🐧🐧🐧🧊🧊 We find it useful at Winton and PI in the Winter months, especially at PI with the no engine start before 9am and we are the first category on track)
@@AW-gj1mu not often, sometimes I’ll chuck a fan heater on the radiator to take the edge off it if it’s freezing but ultimately if you’re not using throttle it doesn’t cause any damage
Yeah this still runs throttle cable. They changed to individual coil packs to start the ability to switch to fly by wire but it never eventuated with the Holden and Ford COTF's. The first version of Mercedes Supercar may have been fly by wire but with single throttle body.
Hi Jack i just wanted to know if you would ever race the HRT car in production style trim at the bathurst 6hr or in the production car championship. Would be nice to see the car race again.
Without knowing the Production Car rules entirely, I'd suggest there's no way this car could possibly be allowed in any form of Production Car Racing because it's a purpose built race car, not using a road car body shell/platform. Cheers!
Hey Jack, a couple of questions. Is this engine SB2 headed? And, what scale is oil pressure measured in? Surely it’s not 275 psi? Sounds good, but not quite as angry or crisp as a sprintcar!
Hi there, there was another question on the SB2 before I got to yours, heres the same answer for that: These never were the SB2, I believe they considered the SB2 cylinder head initially but it never made the race engines. This is known as the Holden Motorsport Engine, sometimes called Aurora. It was implemented into V8Supercars with VY Commodores in 2003 and raced until 2022 with the ZB's. It's a GM block and head, I think the block was originally an existing GM part minus engine mounts on the side of the block, but the cylinder head is specific/custom to V8Supercars. The oil pressure scale is kpa so 275 is basically 40psi. No the Sprintcar engines, I believe, have way more freedoms with Camshafts and what not. Cheers!!
Effectively the 5 litre engine rules were introduced in 1993 and created a steady platform for nearly 30 years. Maintaining the same bore and stroke during that period allowed for stability in the technical rules and some what assisted in cost containment, although costs did blow out in certain areas, but control camshafts and freezing of some rules assisted to some cost containment and ensured market force delivered the most competitive parts and prices. Cheers!!
I don't notice it there, but it can get quite a rattle from the clutch and slave cylinder and the input shaft to drive shaft. Sometimes depressing the clutch makes them much quieter. Cheers!
Awesome video as always Jack love it Smoove as a baby's bum, so the Lam's sensor on exhaust under your feet , are you measuring exhaust temp or just the normal CO2 . Cheers
From cold it would sit there for a while for sure, but when hot, not very long! Correct no thermo fans fitted, but we would leave the engine running at idle in a Bathurst pitstop for 20-35 seconds without major issues. Cheers!
I think you mean Slide Throttle? Holden engines did, then the 18 degree Chev engine couldn't because they had siamese ports not evenly spaced. These HMS engines have even spaces but not sure what the rules allow, so no none of these "current" engines do for reasons unknown.
@perkinsengineering yea slide intake is definitely what that was meant to say. That's interesting 🤔 So the early chevy engines "as in the type that your old man was forced to use" from the mid to late 90s didn't have even spacing? Is that right? When did the chevy engines change to even spaces roughly?
@@justin3131ify that’s correct, the 18 degree’s were Siamese. I can’t speak on behalf of all Chev products, but the next supercars race engine for Holden was a Holden Motorsport Engine, with a specifically designed cylinder head by GM for V8’s and it was evenly spaced 👍👍
I don't know what the specifics regs are, but there's safety measures under Motorsport Australia and Supercars with regards to passenger seat safety requirements and safety gear that has to be worn, so if we organised all of that correctly it should be fine. All passengers typically have to sign disclaimers and waivers etc.
These never were the SB2, I believe they considered the SB2 cylinder head initially but it never made the race engines. This is known as the Holden Motorsport Engine, sometimes called Aurora. It was implemented into V8Supercars with VY Commodores in 2003 and raced until 2022 with the ZB's. It's a GM block and head, I think the block was originally an existing GM part minus engine mounts on the side of the block, but the cylinder head is specific/custom to V8Supercars. Cheers!
The rotating assembly is similar to an SB2.2 - without the larger stroke of course - but they're actually quite a bit different externally. What the HMS / Aurora engine actually entails, is essentially a 307 Chev block in compacted graphite, with a roller 55mm camshaft, 4 bolt mains and a deck that is drilled for the HMS head - which is basically a Chev copy of the D3 style NASCAR head. So it's more Ford than Chev in a way. Back when they were using the actual SB Chev engines in Supercars, the 18 degree head was the equivalent of the C3 style Yates Ford head. When the D3 came out, that was what forced the change for a Chevy variant to help keep up and level the playing field. Laying the older Chev head over further to even lesser degrees and with canted valves etc etc was just not going to work to be able to meet the competitiveness, rules and cost to compete against the D3. As Jack said, the HMS cylinder head is really very specific to Supercars for that reason. Along with the bore hone design, the cylinder head and camshaft is what really makes these little 5L engines boogie!
Touched on a similar question before yours, this car has been with us since 2020/21, well documented on our Facebook page and first featured on Episode 5 of our RU-vid channel back in January 2021. Cheers!
This car has been with us since 2020/21, well documented on our Facebook page and first featured on Episode 5 of our RU-vid channel back in January 2021. Cheers!
The engine was used for nearly 20 years. The control camshaft saved costs but probably needed tighter rules to stop allowing people to spend money on them.
