Racing games with porn are rare, probably because story and porn don’t mesh greatly with driving a car for long stretches of time. or something. Anyway, two racing themed games from the Misc. Game Page. Cannonball from Liar Soft and Moero Blaze.
Cannonball ~Neko Neko Machine Mou Race!~ I II
A turn based racing game from Liar-soft. You play as a space orphan working as a sort of merc. You get a job to find someone, who ends up being a fox girl assassin. You end up stealing her away and end up in the biggest space event, Cannonball. A crazy race of crazy people. Rest of game is learning about the weird people and who the assassin really is. Gameplay is a weird form of racing. Doing good is only needed for h scenes, but the gameplay gets in the way on repeated playthroughs. You have x # of rounds to speed up or attack other racers to get to the top, with a rock-paper-scissors combat system with a few special skills you can learn. Also has a card minigame unlocked after true ending where you can hear all the characters meow sexually, even the guys but to get scenes requires replaying the whole game(including the races) and finding the character’s unique trigger. H scenes are short and not really memorable. Save contains all scenes, cgs, and the card game fully unlocked. Note: not my save, this is one of those games where getting 100% myself would just eat up to much time and effort. I’m more hosting it out of convenience for English only people.
Moero Downhill Night Blaze I II Store
-Racing game, maybe the only real porn racing game. If you didn’t need to replay the 5 tracks 2-3 times each route then the racing gameplay would be alright, but as it is its just monotonous. Story is weak, basically kid wants to beat rival in street race and a tournament shows up, and there’s an asshole making life hard on you. Oh and your casual girlfriend seems to like your rival now. Its a pretty simple story and really only does what it needs to, which is justify driving. Sex scenes are the best part of the game(good length and position #), but aren’t really special, just better then everything else. Game feels like a reimagined Downhill Night 2 with driving added. Same characters, different stories. Same premise, different events. Save contains all cgs and scenes unlocked, as well as saves to see the 5 girl’s endings. Run as admin to actually have the saves work.
english h-rpgs 
Interesting! Thank you for these.